1
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Long T, Zeng YL, Dong ZH, Li S, Zhan J, Zeng SM, Qiu JL, Chu WD, Liu QZ. Nickel-Catalyzed Three-Component Alkylarylation of Alkenyl N-Heteroarenes. Org Lett 2023; 25:8344-8349. [PMID: 37962415 DOI: 10.1021/acs.orglett.3c03474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
A nickel-catalyzed three-component alkylarylation of alkenyl N-heteroarenes with α-bromocarboxylates and aryl boronic acids is reported. The protocol provides a new method to access a variety of N-heteroarene substituted diarylalkanes in moderate to good yields. It features mild reaction conditions, cheap nickel catalyst, readily available substrates, and broad substrate scope.
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Affiliation(s)
- Teng Long
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
| | - Ya-Li Zeng
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
| | - Zhi-Hong Dong
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
| | - Shu Li
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
| | - Jie Zhan
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
| | - Sheng-Min Zeng
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
| | - Jia-Li Qiu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
| | - Wen-Dao Chu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
| | - Quan-Zhong Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, P.R. China
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2
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Sinha SK, Ghosh P, Jain S, Maiti S, Al-Thabati SA, Alshehri AA, Mokhtar M, Maiti D. Transition-metal catalyzed C-H activation as a means of synthesizing complex natural products. Chem Soc Rev 2023; 52:7461-7503. [PMID: 37811747 DOI: 10.1039/d3cs00282a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Over the past few decades, the advent of C-H activation has led to a rethink among chemists about the synthetic strategies employed for multi-step transformations. Indeed, deploying innovative and masterful tricks against the numerous classical organic transformations has been the need of the hour. Despite this, the immense importance of C-H activation remains unfulfilled unless the methodology can be deployed for large-scale industrial processes and towards the concise, step-economic synthesis of prodigious natural products and pharmaceutical drugs. Lately, the growing potential of C-H activation methodology has indeed driven the pioneers of synthetic organic chemists into finding more efficient methods to accelerate the synthesis of such complex molecular scaffolds. This review aims to draw a general overview of the various C-H activation procedures that have been adopted for synthesizing these vast majority of structurally complicated natural products. Our objective lies in drawing a complete picture and taking the readers through the synthesis of a series of such complex organic compounds by simplified techniques, making it step-economic on a larger scale and thus instigating the readers to trigger the use of such methodology and uncover new, unique patterns for future synthesis of such natural products.
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Affiliation(s)
- Soumya Kumar Sinha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Pintu Ghosh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Shubhanshu Jain
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Siddhartha Maiti
- School of Biosciences, Engineering and Technology, VIT Bhopal University, Kothrikalan, Sehore, Madhya Pradesh - 466114, India
| | - Shaeel A Al-Thabati
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Abdulmohsen Ali Alshehri
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Mohamed Mokhtar
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
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3
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Ni HQ, Karunananda MK, Zeng T, Yang S, Liu Z, Houk KN, Liu P, Engle KM. Redox-Paired Alkene Difunctionalization Enables Skeletally Divergent Synthesis. J Am Chem Soc 2023. [PMID: 37220422 DOI: 10.1021/jacs.3c03274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Multistep organic synthesis enables conversion of simple chemical feedstocks into a more structurally complex product that serves a particular function. The target compound is forged over several steps, with concomitant generation of byproducts in each step to account for underlying mechanistic features of the reactions (e.g., redox processes). To map structure-function relationships, libraries of molecules are often needed, and these are typically prepared by iterating an established multistep synthetic sequence. An underdeveloped approach is designing organic reactions that generate multiple valuable products with different carbogenic skeletons in a single synthetic operation. Taking inspiration from paired electrosynthesis processes that are widely used in commodity chemical production (e.g., conversion of glucose to sorbitol and gluconic acid), we report a palladium-catalyzed reaction that converts a single alkene starting material into two skeletally distinct products in a single operation through a series of carbon-carbon and carbon-heteroatom bond-forming events enabled by mutual oxidation and reduction, a process that we term redox-paired alkene difunctionalization. We demonstrate the scope of the method in enabling simultaneous access to reductively 1,2-diarylated and oxidatively [3 + 2]-annulated products, and we explore the mechanistic details of this unique catalytic system using a combination of experimental techniques and density functional theory (DFT). The results described herein establish a distinct approach to small-molecule library synthesis that can increase the rate of compound production. Furthermore, these findings demonstrate how a single transition-metal catalyst can mediate a sophisticated redox-paired process through multiple pathway-selective events along the catalytic cycle.
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Affiliation(s)
- Hui-Qi Ni
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, California 92037, United States
| | - Malkanthi K Karunananda
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, California 92037, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Tian Zeng
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, California 92037, United States
| | - Shenghua Yang
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, California 92037, United States
| | - Zhen Liu
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, California 92037, United States
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, California 92037, United States
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4
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Chemistry and Biological Activities of Naturally Occurring and Structurally Modified Podophyllotoxins. Molecules 2022; 28:molecules28010302. [PMID: 36615496 PMCID: PMC9822336 DOI: 10.3390/molecules28010302] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/17/2022] [Accepted: 12/25/2022] [Indexed: 01/04/2023] Open
Abstract
Plants containing podophyllotoxin and its analogues have been used as folk medicines for centuries. The characteristic chemical structures and strong biological activities of this class of compounds attracted attention worldwide. Currently, more than ninety natural podophyllotoxins were isolated, and structure modifications of these molecules were performed to afford a variety of derivatives, which offered optimized anti-tumor activity. This review summarized up to date reports on natural occurring podophyllotoxins and their sources, structural modification and biological activities. Special attention was paid to both structural modification and optimized antitumor activity. It was noteworthy that etoposide, a derivative of podophyllotoxin, could prevent cytokine storm caused by the recent SARS-CoV-2 viral infection.
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5
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Yu JQ, Hu L, Meng G. Ligand-Enabled Pd(II)-Catalyzed β-Methylene C(sp 3)-H Arylation of Free Aliphatic Acids. J Am Chem Soc 2022; 144:20550-20553. [PMID: 36342466 PMCID: PMC10243520 DOI: 10.1021/jacs.2c09205] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Ligand development has enabled rapid advances in Pd(II)-catalyzed β-methyl C(sp3)-H activation of free carboxylic acids. However, there are only a handful of reports of free-acid-directed β-methylene C(sp3)-H activation, all of which are limited to intramolecular reactions. Herein, we report the first Pd(II)-catalyzed intermolecular β-methylene C(sp3)-H arylation of free aliphatic acids, which is enabled by bidentate pyridine-pyridone ligands. The bite angle of this ligand has been discovered to play a key role in promoting β-methylene C-H activation of free carboxylic acid. This new transformation provides a disconnection for alkylation of arenes with simple aliphatic acids. A variety of free aliphatic acids, including the antiasthmatic drug seratrodast, were compatible with the reported protocol.
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Affiliation(s)
- Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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6
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Li M, Liu Y, Si H, Zhou X, Zhang YJ. Stereoselective Total Synthesis of Formosanol, Tsugacetal, and Methyl β-Conidendral. Org Lett 2022; 24:7812-7816. [PMID: 36222500 DOI: 10.1021/acs.orglett.2c03159] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first enantioselective total synthesis of aryltetralin lignan acetals, (-)-formosanol, (+)-tsugacetal, (+)-methyl β-conidendral, and their enantiomers have been accomplished on the basis of the Pd-catalyzed asymmetric allylic cycloaddition as a key step. Six stereoisomers of the lignan acetals have been synthesized via a 7-8 step sequence in up to 14% overall yield. The in vitro cytotoxicity against several cancer cells has preliminarily been examined for the obtained six stereoisomers of lignan acetals.
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Affiliation(s)
- Meiqi Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, and School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yiming Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, and School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Huiyu Si
- Department of Chemistry, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Xin Zhou
- Department of Chemistry, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Yong Jian Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, and School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Yanbian University, Yanji 133002, P. R. China
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7
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Zhang HQ, Yan CX, Xiao J, Wang YW, Peng Y. Recent advances in the total synthesis of 2,7'-cyclolignans. Org Biomol Chem 2022; 20:1623-1636. [PMID: 35129186 DOI: 10.1039/d1ob02457d] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthetic progress of bioactive 2,7'-cyclolignans is reviewed. After a short introduction to biosynthesis and chemoenzymatic synthesis, the chemical synthesis of various aryltetralin, dihydronaphthalene and 7'-arylnaphthalene-types of these lignans is demonstrated. Notably, newly developed methods, such as Pd-catalyzed C-H arylation, organocatalysis and photocatalysis under visible-light, are discussed during the construction of their skeleton. These efforts will stimulate further development of novel synthetic strategies for this kind of natural product with important biological activities.
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Affiliation(s)
- Han-Qiu Zhang
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China.
| | - Chu-Xuan Yan
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China.
| | - Jian Xiao
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China.
| | - Ya-Wen Wang
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China.
| | - Yu Peng
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China.
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8
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Babu SA, Aggarwal Y, Patel P, Tomar R. Diastereoselective palladium-catalyzed functionalization of prochiral C(sp 3)-H bonds of aliphatic and alicyclic compounds. Chem Commun (Camb) 2022; 58:2612-2633. [PMID: 35113087 DOI: 10.1039/d1cc05649b] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We highlight the reported developments of the palladium-catalyzed C-H activation and functionalization of the inactive/unreactive prochiral C(sp3)-H bonds of aliphatic and alicyclic compounds. There exist numerous classical methods for generating contiguous stereogenic centers in a compound with a high degree of stereocontrol. Along similar lines, the Pd(II)-catalyzed, directing group-aided functionalization of inactive prochiral/diastereotopic C(sp3)-H bonds have been exploited to accomplish the stereoselective construction of stereo-arrays in organic compounds. We present a concise discussion on how specific strategies consisting of Pd(II)-catalyzed, directing group-aided C(sp3)-H functionalization have been utilized to generate two or more stereogenic centers in aliphatic and alicyclic compounds.
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Affiliation(s)
- Srinivasarao Arulananda Babu
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Yashika Aggarwal
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Pooja Patel
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Radha Tomar
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
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9
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Cao JS, Zeng J, Xiao J, Wang XH, Wang Y, Peng Y. Total synthesis of linoxepin facilitated by Ni-catalyzed tandem reductive cyclization. Chem Commun (Camb) 2022; 58:7273-7276. [DOI: 10.1039/d2cc02221d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nickel-catalyzed reductive cyclization was developed to construct the tricyclic core embedded in linoxepin, a cyclolignan with a unique benzoxepin ring. The generated diasterodivergent acetals could be converted to the...
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10
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Liu B, Romine AM, Rubel CZ, Engle KM, Shi BF. Transition-Metal-Catalyzed, Coordination-Assisted Functionalization of Nonactivated C(sp 3)-H Bonds. Chem Rev 2021; 121:14957-15074. [PMID: 34714620 PMCID: PMC8968411 DOI: 10.1021/acs.chemrev.1c00519] [Citation(s) in RCA: 182] [Impact Index Per Article: 60.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Transition-metal-catalyzed, coordination-assisted C(sp3)-H functionalization has revolutionized synthetic planning over the past few decades as the use of these directing groups has allowed for increased access to many strategic positions in organic molecules. Nonetheless, several challenges remain preeminent, such as the requirement for high temperatures, the difficulty in removing or converting directing groups, and, although many metals provide some reactivity, the difficulty in employing metals outside of palladium. This review aims to give a comprehensive overview of coordination-assisted, transition-metal-catalyzed, direct functionalization of nonactivated C(sp3)-H bonds by covering the literature since 2004 in order to demonstrate the current state-of-the-art methods as well as the current limitations. For clarity, this review has been divided into nine sections by the transition metal catalyst with subdivisions by the type of bond formation. Synthetic applications and reaction mechanism are discussed where appropriate.
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Affiliation(s)
- Bin Liu
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 38 Zheda Rd., Hangzhou 310027, China.,College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Andrew M. Romine
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - Camille Z. Rubel
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States.,Corresponding Author- (K. M. E.); (B.-F. S.)
| | - Bing-Feng Shi
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 38 Zheda Rd., Hangzhou 310027, China.,College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China,Corresponding Author- (K. M. E.); (B.-F. S.)
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11
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Wu J, Zhang J, Jiao Y, Deng G, Li Y, Zhang Z, Jiang Y. Palladium-Catalyzed Decarbonylation of Amino Acid Derivatives via C-C Bond and C-N Bond Dual Activations. J Org Chem 2021; 86:17462-17470. [PMID: 34781682 DOI: 10.1021/acs.joc.1c02162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A unique decarbonylation of an amino acid derivative catalytic system has been established via palladium-catalyzed C-C bond and C-N bond dual activations. By employing 8-aminoquinoline as the directing group, this transformation has been found to facilitate the high chemoselectivity to decarbonylation of amino acid derivatives rather than intramolecular deamination or cross-dehydrogenative coupling reactions. This method provides a straightforward avenue for constructing diverse functionalized amide compounds in good to excellent yields. We proposed a possible reaction pathway that may go through the C-C bond and C-N bond dual activations on the basis of the mechanistic studies.
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Affiliation(s)
- Jiamin Wu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Jinli Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Yongjuan Jiao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Gongtao Deng
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Yingmei Li
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Zhengyu Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Yaojia Jiang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.,Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
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12
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Gao Z, Ren L, Wang R, Shi L, Wang Y, Su F, Hao HD. Total Synthesis of (±)-Codonopiloneolignanin A. Org Lett 2021; 23:5684-5688. [PMID: 34251830 DOI: 10.1021/acs.orglett.1c01803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An intramolecular formal [3 + 2] cationic cycloaddition between benzylic carbocation and styrene was developed for the total synthesis of codonopiloneolignanin A. Further study shows benzocycloheptene as a good substrate for 1,3-dipolar cycloaddition, and a model study toward cephalocyclidine A skeleton was reported.
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Affiliation(s)
- Zhiyu Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Li Ren
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ruizhi Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Liang Shi
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanhai Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Feng Su
- Department of Chemistry, Changzhi University, Changzhi 046011, Shanxi China
| | - Hong-Dong Hao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China.,State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Science, Shanghai 200032, China
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13
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Xu M, Hou M, He H, Gao S. Asymmetric Total Synthesis of Aglacins A, B, and E. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mengmeng Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes School of Chemistry and Molecular Engineering East China Normal University China
| | - Min Hou
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes School of Chemistry and Molecular Engineering East China Normal University China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development East China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes School of Chemistry and Molecular Engineering East China Normal University China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development East China Normal University 3663 North Zhongshan Road Shanghai 200062 China
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14
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Xu M, Hou M, He H, Gao S. Asymmetric Total Synthesis of Aglacins A, B, and E. Angew Chem Int Ed Engl 2021; 60:16655-16660. [PMID: 34008314 DOI: 10.1002/anie.202105395] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Indexed: 12/16/2022]
Abstract
An asymmetric photoenolization/Diels-Alder (PEDA) reaction between electron-rich 2-methylbenzaldehydes and unsaturated γ-lactones was developed to directly construct the basic tricyclic core of aryltetralin lactone lignans. This methodology enabled the first asymmetric total synthesis of aglacins A, B, and E and revision of the absolute configuration of these natural lignans. The strategy was also used to prepare the naturally occurring aryldihydronaphthalene-type lignans (-)-7,8-dihydroisojusticidin B and (+)-linoxepin in four and six steps, as well as 27 natural-product-like molecules containing a C8' quaternary center. We believe that the synthetic aglacins and small-molecule library provide new opportunities to carry out the SAR studies of the podophyllotoxin family of natural products.
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Affiliation(s)
- Mengmeng Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes, School of Chemistry and Molecular Engineering, East China Normal University, China
| | - Min Hou
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes, School of Chemistry and Molecular Engineering, East China Normal University, China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes, School of Chemistry and Molecular Engineering, East China Normal University, China.,Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
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15
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Lam NYS, Wu K, Yu JQ. Advancing the Logic of Chemical Synthesis: C-H Activation as Strategic and Tactical Disconnections for C-C Bond Construction. Angew Chem Int Ed Engl 2021; 60:15767-15790. [PMID: 33073459 PMCID: PMC8177825 DOI: 10.1002/anie.202011901] [Citation(s) in RCA: 152] [Impact Index Per Article: 50.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/28/2020] [Indexed: 12/13/2022]
Abstract
The design of synthetic routes by retrosynthetic logic is decisively influenced by the transformations available. Transition-metal-catalyzed C-H activation has emerged as a powerful strategy for C-C bond formation, with myriad methods developed for diverse substrates and coupling partners. However, its uptake in total synthesis has been tepid, partially due to their apparent synthetic intractability, as well as a lack of comprehensive guidelines for implementation. This Review addresses these issues and offers a guide to identify retrosynthetic opportunities to generate C-C bonds by C-H activation processes. By comparing total syntheses accomplished using traditional approaches and recent C-H activation methods, this Review demonstrates how C-H activation enabled C-C bond construction has led to more efficient retrosynthetic strategies, as well as the execution of previously unattainable tactical maneuvers. Finally, shortcomings of existing processes are highlighted; this Review illustrates how some highlighted total syntheses can be further economized by adopting next-generation ligand-enabled approaches.
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Affiliation(s)
- Nelson Y S Lam
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Kevin Wu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
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16
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Chumsri N, Kuhakarn C, Leowanawat P, Reutrakul V, Soorukram D. Concise synthesis and confirmation of the absolute configurations of naturally occurring bioactive 2,7′-cyclolignans. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Suseelan AS, Dutta A, Lahiri GK, Maiti D. Organopalladium Intermediates in Coordination-Directed C(sp3)-H Functionalizations. TRENDS IN CHEMISTRY 2021. [DOI: 10.1016/j.trechm.2020.11.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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18
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Provencher PA, Bay KL, Hoskin JF, Houk KN, Yu JQ, Sorensen EJ. Cyclization by C(sp 3)–H Arylation with a Transient Directing Group for the Diastereoselective Preparation of Indanes. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05081] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Philip A. Provencher
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Katherine L. Bay
- Department of Chemistry and Biochemistry, University of Chemistry, Los Angeles, California 90095, United States
| | - John F. Hoskin
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of Chemistry, Los Angeles, California 90095, United States
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Erik J. Sorensen
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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19
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Lam NYS, Wu K, Yu J. Advancing the Logic of Chemical Synthesis: C−H Activation as Strategic and Tactical Disconnections for C−C Bond Construction. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011901] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Nelson Y. S. Lam
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Kevin Wu
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Jin‐Quan Yu
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
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20
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Saridakis I, Kaiser D, Maulide N. Unconventional Macrocyclizations in Natural Product Synthesis. ACS CENTRAL SCIENCE 2020; 6:1869-1889. [PMID: 33274267 PMCID: PMC7706100 DOI: 10.1021/acscentsci.0c00599] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Indexed: 06/12/2023]
Abstract
Over the past several decades, macrocyclic compounds have emerged as increasingly significant therapeutic candidates in drug discovery. Their pharmacological activity hinges on their rotationally restricted three-dimensional orientation, resulting in a unique conformational preorganization and a high enthalpic gain as a consequence of high-affinity macrocycle-protein binding interactions. Synthetic access to macrocyclic drug candidates is therefore crucial. From a synthetic point of view, the efficiency of macrocyclization events commonly suffers from entropic penalties as well as undesired intermolecular couplings (oligomerization). Although over the past several decades ring-closing metathesis, macrolactonization, or macrolactamization have become strategies of choice, the toolbox of organic synthesis provides a great number of versatile transformations beyond the aforementioned. This Outlook focuses on a selection of examples employing what we term unconventional macrocyclizations toward the synthesis of natural products or analogues.
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Affiliation(s)
- Iakovos Saridakis
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Daniel Kaiser
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
- Research
Platform for Next Generation Macrocycles, Währinger Strasse 38, 1090 Vienna, Austria
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21
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Xiang JC, Wang Q, Zhu J. Radical-Cation Cascade to Aryltetralin Cyclic Ether Lignans Under Visible-Light Photoredox Catalysis. Angew Chem Int Ed Engl 2020; 59:21195-21202. [PMID: 32744786 DOI: 10.1002/anie.202007548] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/27/2020] [Indexed: 12/16/2022]
Abstract
The development of concise, sustainable, and cost-effective synthesis of aryltetralin lignans, bearing either a fused lactone or cyclic ether, is of significant medicinal importance. Reported is that in the presence of Fukuzumi's acridinium salt under blue LED irradiation, functionalized dicinnamyl ether derivatives are converted into aryltetralin cyclic ether lignans with concurrent generation of three stereocenters in good to high yields with up to 20:1 diastereoselectivity. Oxidation of an alkene to the radical cation is key to the success of this formal Diels-Alder reaction of electronically mismatched diene and dienophile. Applying this methodology, six natural products, aglacin B, aglacin C, sulabiroin A, sulabiroin B, gaultherin C, and isoshonanin, are synthesized in only two to three steps from readily available biomass-derived monolignols. A revised structure is proposed for gaultherin C.
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Affiliation(s)
- Jia-Chen Xiang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
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22
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Kumar A, Kumar M, Verma AK. Well-Defined Palladium N-Heterocyclic Carbene Complexes: Direct C-H Bond Arylation of Heteroarenes. J Org Chem 2020; 85:13983-13996. [PMID: 33064481 DOI: 10.1021/acs.joc.0c02024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of palladium N-heterocyclic carbene (NHC) complexes of type trans-{(NHC)PdCl2L} (L = C5H5N, 3-ClC5H4N, and PPh3) (3-5) have been developed as efficient precatalysts for direct C-H bond arylation of various heteroarenes. In particular, an in situ generated new NHC ligand derived from {1,3-di-(2,6-diethylphenyl)acenaphtho[1,2-d] imidazolium} chloride (2) is used for the stabilization of the palladium metal center. Among the screened palladium precatalysts (3-5), the most active PEPPSI themed complex (3) was successfully employed toward direct C-H bond arylation of various heteroarenes and aryl bromides. A range of functional groups on aryl bromides as well as on heteroarenes sustained throughout the standard reaction conditions for easy access of various arylated heterocyclic compounds. Significantly, the utility of the protocol was demonstrated by the effective synthesis of a precursor of raloxifene, a selective estrogen receptor modulator.
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Affiliation(s)
- Anuj Kumar
- Synthetic Organic Chemistry Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Manoj Kumar
- Synthetic Organic Chemistry Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Akhilesh K Verma
- Synthetic Organic Chemistry Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
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23
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Xiang J, Wang Q, Zhu J. Radical‐Cation Cascade to Aryltetralin Cyclic Ether Lignans Under Visible‐Light Photoredox Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007548] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jia‐Chen Xiang
- Laboratory of Synthesis and Natural Products Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
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24
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Alfonzo E, Millimaci AM, Beeler AB. Photoredox Generated Carbonyl Ylides Enable a Modular Approach to Aryltetralin, Dihydronaphthalene, and Arylnaphthalene Lignans. Org Lett 2020; 22:6489-6493. [PMID: 32806135 DOI: 10.1021/acs.orglett.0c02286] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A one-pot synthesis of dihydronaphthalenes and arylnaphthalenes from epoxides and common dipolarophiles is described. The reaction proceeds through photoredox activation of epoxides to carbonyl ylides, which undergo concerted [3 + 2] dipolar cycloaddition with dipolarophiles to provide tetrahydrofurans or 2,5-dihydrofurans. In the same flask, acid promoted rearrangement affords densely functionalized dihydronaphthalenes and arylnaphthalenes, respectively, in an overall redox-neutral sequence of transformations. Succinct total synthesis (4-6 steps) of pycnanthulignene B and C and justicidin E are reported.
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Affiliation(s)
- Edwin Alfonzo
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Alexandra M Millimaci
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Aaron B Beeler
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
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25
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Chen R, Shen Y, Yang S, Zhang Y. Conformational Design Principles in Total Synthesis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003735] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Renzhi Chen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Yang Shen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Sihan Yang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
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26
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Chen R, Shen Y, Yang S, Zhang Y. Conformational Design Principles in Total Synthesis. Angew Chem Int Ed Engl 2020; 59:14198-14210. [DOI: 10.1002/anie.202003735] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Renzhi Chen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Yang Shen
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Sihan Yang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province, iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
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27
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Rej S, Ano Y, Chatani N. Bidentate Directing Groups: An Efficient Tool in C-H Bond Functionalization Chemistry for the Expedient Construction of C-C Bonds. Chem Rev 2020; 120:1788-1887. [PMID: 31904219 DOI: 10.1021/acs.chemrev.9b00495] [Citation(s) in RCA: 561] [Impact Index Per Article: 140.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
During the past decades, synthetic organic chemistry discovered that directing group assisted C-H activation is a key tool for the expedient and siteselective construction of C-C bonds. Among the various directing group strategies, bidentate directing groups are now recognized as one of the most efficient devices for the selective functionalization of certain positions due to fact that its metal center permits fine, tunable, and reversible coordination. The family of bidentate directing groups permit various types of assistance to be achieved, such as N,N-dentate, N,O-dentate, and N,S-dentate auxiliaries, which are categorized based on the coordination site. In this review, we broadly discuss various C-H bond functionalization reactions for the formation of C-C bonds with the aid of bidentate directing groups.
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Affiliation(s)
- Supriya Rej
- Department of Applied Chemistry, Faculty of Engineering , Osaka University , Suita , Osaka 560-0871 , Japan
| | - Yusuke Ano
- Department of Applied Chemistry, Faculty of Engineering , Osaka University , Suita , Osaka 560-0871 , Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering , Osaka University , Suita , Osaka 560-0871 , Japan
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28
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Schultz BJ, Kim SY, Lau W, Sattely ES. Total Biosynthesis for Milligram-Scale Production of Etoposide Intermediates in a Plant Chassis. J Am Chem Soc 2019; 141:19231-19235. [PMID: 31755709 PMCID: PMC7380830 DOI: 10.1021/jacs.9b10717] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Etoposide is a plant-derived drug used clinically to treat several forms of cancer. Recent shortages of etoposide demonstrate the need for a more dependable production method to replace the semisynthetic method currently in place, which relies on extraction of a precursor natural product from Himalayan mayapple. Here we report milligram-scale production of (-)-deoxypodophyllotoxin, a late-stage biosynthetic precursor to the etoposide aglycone, using an engineered biosynthetic pathway in tobacco. Our strategy relies on engineering the supply of coniferyl alcohol, an endogenous tobacco metabolite and monolignol precursor to the etoposide aglycone. We show that transient expression of 16 genes, encoding both coniferyl alcohol and main etoposide aglycone pathway enzymes from mayapple, in tobacco leaves results in the accumulation of up to 4.3 mg/g dry plant weight (-)-deoxypodophyllotoxin, and enables isolation of high-purity (-)-deoxypodophyllotoxin after chromatography at levels up to 0.71 mg/g dry plant weight. Our work reveals that long (>10 step) pathways can be efficiently transferred from difficult-to-cultivate medicinal plants to a tobacco plant production chassis, and demonstrates mg-scale total biosynthesis for access to valuable precursors of the chemotherapeutic etoposide.
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Affiliation(s)
- Bailey J. Schultz
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Seung Yeon Kim
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Warren Lau
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Elizabeth S. Sattely
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
- Howard Hughes Medical Institute, Stanford University, Stanford, California 94305, United States
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29
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Tong HR, Zheng W, Lv X, He G, Liu P, Chen G. Asymmetric Synthesis of β-Lactam via Palladium-Catalyzed Enantioselective Intramolecular C(sp3)–H Amidation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04768] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Hua-Rong Tong
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Wenrui Zheng
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Xiaoyan Lv
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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30
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Le KKA, Nguyen H, Daugulis O. 1-Aminopyridinium Ylides as Monodentate Directing Groups for sp 3 C-H Bond Functionalization. J Am Chem Soc 2019; 141:14728-14735. [PMID: 31529954 DOI: 10.1021/jacs.9b06643] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
1-Aminopyridinium ylides are efficient directing groups for palladium-catalyzed β-arylation and alkylation of sp3 C-H bonds in carboxylic acid derivatives. The efficiency of these directing groups depends on the substitution at the pyridine moiety. The unsubstituted pyridine-derived ylides allow functionalization of primary C-H bonds, while methylene groups are unreactive in the absence of external ligands. 4-Pyrrolidinopyridine-containing ylides are capable of C-H functionalization in acyclic methylene groups in the absence of external ligands, thus rivaling the efficiency of the aminoquinoline directing group. Preliminary mechanistic studies have been performed. A cyclopalladated intermediate has been isolated and characterized by X-ray crystallography, and its reactivity was studied.
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Affiliation(s)
- Ky Khac Anh Le
- Department of Chemistry , University of Houston , Houston , Texas 77204-5003 , United States
| | - Hanh Nguyen
- Department of Chemistry , University of Houston , Houston , Texas 77204-5003 , United States
| | - Olafs Daugulis
- Department of Chemistry , University of Houston , Houston , Texas 77204-5003 , United States
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31
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Nicke L, Horx P, Harms K, Geyer A. Directed C(sp 3)-H arylation of tryptophan: transformation of the directing group into an activated amide. Chem Sci 2019; 10:8634-8641. [PMID: 31803437 PMCID: PMC6844298 DOI: 10.1039/c9sc03440d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 08/03/2019] [Indexed: 12/18/2022] Open
Abstract
The aminoquinoline-directed C–H activation was used to synthezise unnatural tryptophans for solid phase peptide synthesis for the first time.
The 8-aminoquinoline (8AQ) directed C(sp3)–H functionalization was applied in the synthesis of β-arylated tryptophan derivatives. The laborious protecting group reorganization towards α-amino acids compatible for solid phase peptide synthesis (SPPS) was cut short by the transformation of the directing group into an activated amide, which was either used directly in peptide coupling or in the gram scale synthesis of storable Fmoc-protected amino acids for SPPS. In this work, directed C–H activation and nonplanar amide chemistry complement each other for the synthesis of hybrids between phenylalanine and tryptophan with restricted side chain mobility.
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Affiliation(s)
- Lennart Nicke
- Philipps-Universität Marburg , Fachbereich Chemie , Hans Meerwein Straße , 35032 Marburg , Germany .
| | - Philip Horx
- Philipps-Universität Marburg , Fachbereich Chemie , Hans Meerwein Straße , 35032 Marburg , Germany .
| | - Klaus Harms
- Philipps-Universität Marburg , Fachbereich Chemie , Hans Meerwein Straße , 35032 Marburg , Germany .
| | - Armin Geyer
- Philipps-Universität Marburg , Fachbereich Chemie , Hans Meerwein Straße , 35032 Marburg , Germany .
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32
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Li J, Zhang X, Renata H. Asymmetric Chemoenzymatic Synthesis of (-)-Podophyllotoxin and Related Aryltetralin Lignans. Angew Chem Int Ed Engl 2019; 58:11657-11660. [PMID: 31241812 DOI: 10.1002/anie.201904102] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Indexed: 11/06/2022]
Abstract
(-)-Podophyllotoxin is one of the most potent microtubule depolymerizing agents and has served as an important lead compound in antineoplastic drug discovery. Reported here is a short chemoenzymatic total synthesis of (-)-podophyllotoxin and related aryltetralin lignans. Vital to this approach is the use of an enzymatic oxidative C-C coupling reaction to construct the tetracyclic core of the natural product in a diastereoselective fashion. This strategy allows gram-scale access to (-)-deoxypodophyllotoxin and is readily adaptable to the preparation of related aryltetralin lignans.
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Affiliation(s)
- Jian Li
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, FL, 33458, USA
| | - Xiao Zhang
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, FL, 33458, USA
| | - Hans Renata
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, FL, 33458, USA
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33
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Li J, Zhang X, Renata H. Asymmetric Chemoenzymatic Synthesis of (−)‐Podophyllotoxin and Related Aryltetralin Lignans. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904102] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jian Li
- Department of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Xiao Zhang
- Department of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Hans Renata
- Department of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
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34
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Alfonzo E, Beeler AB. A sterically encumbered photoredox catalyst enables the unified synthesis of the classical lignan family of natural products. Chem Sci 2019; 10:7746-7754. [PMID: 31588322 PMCID: PMC6761868 DOI: 10.1039/c9sc02682g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 06/30/2019] [Indexed: 11/21/2022] Open
Abstract
Herein, we detail a unified synthetic approach to the classical lignan family of natural products that hinges on divergence from a common intermediate that was strategically identified from nature's biosynthetic blueprints.
Herein, we detail a unified synthetic approach to the classical lignan family of natural products that hinges on divergence from a common intermediate that was strategically identified from nature's biosynthetic blueprints. Efforts toward accessing the common intermediate through a convergent and modular approach resulted in the discovery of a sterically encumbered photoredox catalyst that can selectively generate carbonyl ylides from electron-rich epoxides. These can undergo concerted [3 + 2] dipolar cycloadditions to afford tetrahydrofurans, which were advanced (2–4 steps) to at least one representative natural product or natural product scaffold within all six subtypes in classical lignans. The application of those synthetic blueprints to the synthesis of heterolignans bearing unnatural functionality was demonstrated, which establishes the potential of this strategy to accelerate structure–activity-relationship studies of these natural product frameworks and their rich biological activity.
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Affiliation(s)
- Edwin Alfonzo
- Department of Chemistry , Boston University , Boston , Massachusetts 02215 , USA .
| | - Aaron B Beeler
- Department of Chemistry , Boston University , Boston , Massachusetts 02215 , USA .
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35
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Ting CP, Tschanen E, Jang E, Maimone TJ. Total synthesis of podophyllotoxin and select analog designs via C–H activation. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.04.052] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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36
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Hartmann P, Lazzarotto M, Steiner L, Cigan E, Poschenrieder S, Sagmeister P, Fuchs M. TRIP-Catalyzed Asymmetric Synthesis of (+)-Yatein, (-)-α-Conidendrin, (+)-Isostegane, and (+)-Neoisostegane. J Org Chem 2019; 84:5831-5837. [PMID: 30920215 DOI: 10.1021/acs.joc.9b00065] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The asymmetric allylation under the assistance of catalytic amounts of 3,3'-bis(2,4,6-triisopropylphenyl)-1,1'-binaphthyl-2,2'-diyl hydrogen phosphate (TRIP) allows the concise construction of the lignan scaffold from simple aldehydes and allylic bromides with full control of the two formed stereocenters. This young methodology has been employed to synthesize four naturally and pharmaceutically active lignans. Members of the dibenzylbutyrolactone, the tetraline, and the dibenzocyclooctadiene classes have been synthesized in 40-47% overall yield along four-step synthetic routes.
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Affiliation(s)
- Peter Hartmann
- University of Graz , Institute of Chemistry, Bioorganic and Organic Chemistry , Heinrichstrasse 28/II , Graz 8010 , Austria
| | - Mattia Lazzarotto
- University of Graz , Institute of Chemistry, Bioorganic and Organic Chemistry , Heinrichstrasse 28/II , Graz 8010 , Austria
| | - Lorenz Steiner
- University of Graz , Institute of Chemistry, Bioorganic and Organic Chemistry , Heinrichstrasse 28/II , Graz 8010 , Austria
| | - Emmanuel Cigan
- University of Graz , Institute of Chemistry, Bioorganic and Organic Chemistry , Heinrichstrasse 28/II , Graz 8010 , Austria
| | - Silvan Poschenrieder
- University of Graz , Institute of Chemistry, Bioorganic and Organic Chemistry , Heinrichstrasse 28/II , Graz 8010 , Austria
| | - Peter Sagmeister
- University of Graz , Institute of Chemistry, Bioorganic and Organic Chemistry , Heinrichstrasse 28/II , Graz 8010 , Austria
| | - Michael Fuchs
- University of Graz , Institute of Chemistry, Bioorganic and Organic Chemistry , Heinrichstrasse 28/II , Graz 8010 , Austria
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37
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Kinsinger T, Kazmaier U. Mono-selective β-C–H arylation of N-methylated amino acids and peptides promoted by the 2-(methylthio)aniline directing group. Org Biomol Chem 2019; 17:5595-5600. [DOI: 10.1039/c9ob00966c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
2-(Methylthio)aniline (MTA) directed C(sp3)–H functionalisations are efficient and straightforward protocols for the selective β-modification of N-methylated amino acids.
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Affiliation(s)
- Thorsten Kinsinger
- Institute of Organic Chemistry
- Saarland University
- 66041 Saarbrücken
- Germany
| | - Uli Kazmaier
- Institute of Organic Chemistry
- Saarland University
- 66041 Saarbrücken
- Germany
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38
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Abrams DJ, Provencher PA, Sorensen EJ. Recent applications of C-H functionalization in complex natural product synthesis. Chem Soc Rev 2018; 47:8925-8967. [PMID: 30426998 DOI: 10.1039/c8cs00716k] [Citation(s) in RCA: 375] [Impact Index Per Article: 62.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In this review, recent examples featuring C-H functionalization in the synthesis of complex natural products are discussed. A focus is given to the way in which C-H functionalization can influence the logical process of retrosynthesis, and the review is organized by the type and method of C-H functionalization.
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Affiliation(s)
- Dylan J Abrams
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
| | | | - Erik J Sorensen
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
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39
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Zheng Y, Song W, Zhu Y, Wei B, Xuan L. Total synthesis of lithospermic acid using Fe-catalyzed Cross-Dehydrogenative-Coupling reaction and Pd-catalyzed ester-directed C H olefination. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.08.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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40
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Chapman LM, Beck JC, Lacker CR, Wu L, Reisman SE. Evolution of a Strategy for the Enantioselective Total Synthesis of (+)-Psiguadial B. J Org Chem 2018; 83:6066-6085. [PMID: 29728045 PMCID: PMC5990278 DOI: 10.1021/acs.joc.8b00728] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
(+)-Psiguadial B is a diformyl phloroglucinol meroterpenoid that exhibits antiproliferative activity against the HepG2 human hepatoma cancer cell line. This full account details the evolution of a strategy that culminated in the first enantioselective total synthesis of (+)-psiguadial B. A key feature of the synthesis is the construction of the trans-cyclobutane motif by a Wolff rearrangement with in situ catalytic, asymmetric trapping of the ketene. An investigation of the substrate scope of this method to prepare enantioenriched 8-aminoquinolinamides is disclosed. Three routes toward (+)-psiguadial B were evaluated that featured the following key steps: (1) an ortho-quinone methide hetero-Diels-Alder cycloaddition to prepare the chroman framework, (2) a Prins cyclization to form the bridging bicyclo[4.3.1]decane system, and (3) a modified Norrish-Yang cyclization to generate the chroman. Ultimately, the successful strategy employed a ring-closing metathesis to form the seven-membered ring and an intramolecular O-arylation reaction to complete the polycyclic framework of the natural product.
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Affiliation(s)
- Lauren M. Chapman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | | | | | - Linglin Wu
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Sarah E. Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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41
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Xiao J, Cong XW, Yang GZ, Wang YW, Peng Y. Divergent Asymmetric Syntheses of Podophyllotoxin and Related Family Members via Stereoselective Reductive Ni-Catalysis. Org Lett 2018; 20:1651-1654. [DOI: 10.1021/acs.orglett.8b00408] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jian Xiao
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Xiao-Wei Cong
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Gui-Zhen Yang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Ya-Wen Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Yu Peng
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
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42
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KC S, Basnet P, Thapa S, Shrestha B, Giri R. Ni-Catalyzed Regioselective Dicarbofunctionalization of Unactivated Olefins by Tandem Cyclization/Cross-Coupling and Application to the Concise Synthesis of Lignan Natural Products. J Org Chem 2018; 83:2920-2936. [DOI: 10.1021/acs.joc.8b00184] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shekhar KC
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Prakash Basnet
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Surendra Thapa
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Bijay Shrestha
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Ramesh Giri
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, New Mexico 87131, United States
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43
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Yang H, Dormer PG, Rivera NR, Hoover AJ. Palladium(II)-Mediated C-H Tritiation of Complex Pharmaceuticals. Angew Chem Int Ed Engl 2018; 57:1883-1887. [PMID: 29314462 DOI: 10.1002/anie.201711364] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 12/13/2017] [Indexed: 11/09/2022]
Abstract
Tritium-labeled molecules are critical tools for elucidating the binding and metabolic properties of bioactive compounds, particularly during pharmaceutical discovery. Direct tritiation of inert C-H bonds with T2 gas is an ideal approach for tritium labeling, but significant gaps remain for direct tritiation of structurally complex molecules with diverse functional groups. Here we report the first application of palladium(II) C-H activation chemistry for tritiation with T2 gas. This practical transformation exhibits novel substrate scope and greater functional group tolerance compared to previous state of the art tritiation methods, and has been applied to directly tritiate 9 complex pharmaceuticals and an unprotected dipeptide. The isolated tritium-labeled products exhibit >15 Ci mmol-1 specific activity, exceeding the typical requirements for application in studies of molecular interaction and metabolism.
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Affiliation(s)
- Haifeng Yang
- Department of Process Research & Development, MRL, Merck Sharp & Dohme Corp., Rahway, NJ, 07065, USA
| | - Peter G Dormer
- Department of Process Research & Development, MRL, Merck Sharp & Dohme Corp., Rahway, NJ, 07065, USA
| | - Nelo R Rivera
- Department of Process Research & Development, MRL, Merck Sharp & Dohme Corp., Rahway, NJ, 07065, USA
| | - Andrew J Hoover
- Department of Process Research & Development, MRL, Merck Sharp & Dohme Corp., Rahway, NJ, 07065, USA
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44
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Yang H, Dormer PG, Rivera NR, Hoover AJ. Palladium(II)-Mediated C−H Tritiation of Complex Pharmaceuticals. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711364] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Haifeng Yang
- Department of Process Research & Development, MRL; Merck Sharp & Dohme Corp.; Rahway NJ 07065 USA
| | - Peter G. Dormer
- Department of Process Research & Development, MRL; Merck Sharp & Dohme Corp.; Rahway NJ 07065 USA
| | - Nelo R. Rivera
- Department of Process Research & Development, MRL; Merck Sharp & Dohme Corp.; Rahway NJ 07065 USA
| | - Andrew J. Hoover
- Department of Process Research & Development, MRL; Merck Sharp & Dohme Corp.; Rahway NJ 07065 USA
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45
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Yang B, Gao S. Recent advances in the application of Diels–Alder reactions involving o-quinodimethanes, aza-o-quinone methides and o-quinone methides in natural product total synthesis. Chem Soc Rev 2018; 47:7926-7953. [DOI: 10.1039/c8cs00274f] [Citation(s) in RCA: 240] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review summarizes recent advances in Diels–Alder reactions involving o-QDMs, o-QMs and aza-o-QMs. The power and potential of this strategy in organic synthesis and natural product total synthesis is highlighted.
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Affiliation(s)
- Baochao Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
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46
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Abstract
The first catalytic enantioselective total synthesis of (-)-podophyllotoxin is accomplished by a challenging organocatalytic cross-aldol Heck cyclization and distal stereocontrolled transfer hydrogenation in five steps from three aldehydes. Reversal of selectivity in hydrogenation led to the syntheses of other stereoisomers from the common precursor.
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Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research (CBMR), Sanjay Gandhi Postgraduate Institute of Medical Sciences Campus , Raebareli Road, Lucknow 226014, UP, India
| | - Sujay Garai
- Centre of Biomedical Research (CBMR), Sanjay Gandhi Postgraduate Institute of Medical Sciences Campus , Raebareli Road, Lucknow 226014, UP, India.,Department of Chemistry, Indian Institute of Technology Kharagpur (IIT Kharagpur) , Kharagpur 721302, WB, India
| | - Sunit Hazra
- Department of Chemistry, Indian Institute of Technology Kharagpur (IIT Kharagpur) , Kharagpur 721302, WB, India
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47
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Gou Q, Liu G, Zhou L, Chen S, Qin J. Palladium-Catalyzed Base-Promoted Arylation of Unactivated C(sp3)-H Bonds by Aryl Iodides: A Practical Approach To Synthesize β-Aryl Carboxylic Acid Derivatives. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701215] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Quan Gou
- Key Laboratory of Medicinal Chemistry for Natural Resource; Ministry of Education; Yunnan University; 650091 School of Chemical Science and Technology P. R. China
| | - Gang Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource; Ministry of Education; Yunnan University; 650091 School of Chemical Science and Technology P. R. China
| | - Lanxiu Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource; Ministry of Education; Yunnan University; 650091 School of Chemical Science and Technology P. R. China
| | - Suiyun Chen
- Plant Science Institute; School of Life Sciences; Yunnan University; 650091 Kunming P. R. China
| | - Jun Qin
- Key Laboratory of Medicinal Chemistry for Natural Resource; Ministry of Education; Yunnan University; 650091 School of Chemical Science and Technology P. R. China
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48
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Lisiecki K, Krawczyk KK, Roszkowski P, Maurin JK, Budzianowski A, Czarnocki Z. Unusual visible-light photolytic cleavage of tertiary amides during the synthesis of cyclolignans related to podophyllotoxin. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Brady PB, Bhat V. Recent Applications of Rh- and Pd-Catalyzed C(sp3)-H Functionalization in Natural Product Total Synthesis. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700641] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Patrick B. Brady
- Oncology Discovery; AbbVie, Inc.; 1 N Waukegan Road 60064 North Chicago IL USA
| | - Vikram Bhat
- Oncology Discovery; AbbVie, Inc.; 1 N Waukegan Road 60064 North Chicago IL USA
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50
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Zhang Z, Wang J, Li J, Yang F, Liu G, Tang W, He W, Fu JJ, Shen YH, Li A, Zhang WD. Total Synthesis and Stereochemical Assignment of Delavatine A: Rh-Catalyzed Asymmetric Hydrogenation of Indene-Type Tetrasubstituted Olefins and Kinetic Resolution through Pd-Catalyzed Triflamide-Directed C–H Olefination. J Am Chem Soc 2017; 139:5558-5567. [DOI: 10.1021/jacs.7b01718] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zhongyin Zhang
- School
of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Department
of Phytochemistry, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative
Innovation Center of Chemistry for Life Sciences, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Jinxin Wang
- Department
of Phytochemistry, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative
Innovation Center of Chemistry for Life Sciences, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Jian Li
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative
Innovation Center of Chemistry for Life Sciences, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Fan Yang
- School
of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Guodu Liu
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative
Innovation Center of Chemistry for Life Sciences, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Wenjun Tang
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative
Innovation Center of Chemistry for Life Sciences, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Weiwei He
- School
of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jian-Jun Fu
- School
of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yun-Heng Shen
- Department
of Phytochemistry, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Ang Li
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Collaborative
Innovation Center of Chemistry for Life Sciences, Shanghai Institute
of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Wei-Dong Zhang
- School
of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Department
of Phytochemistry, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
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