1
|
Wu Y, Ding C, Zhang Z, Zhang J, Li Y, Song X, Zhang D. Sesquilignans: Current research and potential prospective. Eur J Med Chem 2024; 271:116445. [PMID: 38701715 DOI: 10.1016/j.ejmech.2024.116445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/19/2024] [Accepted: 04/19/2024] [Indexed: 05/05/2024]
Abstract
Lignans are widely distributed in nature, primarily found in the xylem and resins of plants, with the constituent units C6-C3, and their dimers are the most common in plants. In recent years, the trimeric sesquilignans have also received increasing attention from scholars. More than 200 derivatives have been isolated and identified from nearly 50 families, most of which are different types (monoepoxy lignans, bisepoxy lignans, benzofuran lignans) connected with simple phenylpropanoids through ether bonds, C-C bonds, and oxygen-containing rings to constitute sesquilignans. Some of them also possess pharmacological properties, including antioxidants, hepatoprotectives, antitumors, anti-inflammatory properties, and other properties. In addition, the chemical structure of sesquilignans is closely related to the pharmacological activity, and chemical modification of methoxylation enhances the pharmacological activity. In contrast, phenolic hydroxyl and hydroxyl glycosides reduce the pharmacological activity. Therefore, the present review aims to summarize the chemical diversity, bioactivities, and constitutive relationships to provide a theoretical basis for the more profound development and utilization of sesquilignans.
Collapse
Affiliation(s)
- Ying Wu
- School of Pharmacy, Shaanxi Key Laboratory of Research and Application of "Taibai Qi Yao", Shaanxi University of Chinese Medicine, Xianyang, 712046, PR China.
| | - Chao Ding
- School of Pharmacy, Shaanxi Key Laboratory of Research and Application of "Taibai Qi Yao", Shaanxi University of Chinese Medicine, Xianyang, 712046, PR China.
| | - Zilong Zhang
- School of Pharmacy, Shaanxi Key Laboratory of Research and Application of "Taibai Qi Yao", Shaanxi University of Chinese Medicine, Xianyang, 712046, PR China.
| | - Jiayi Zhang
- School of Pharmacy, Shaanxi Key Laboratory of Research and Application of "Taibai Qi Yao", Shaanxi University of Chinese Medicine, Xianyang, 712046, PR China.
| | - Yuze Li
- School of Pharmacy, Shaanxi Key Laboratory of Research and Application of "Taibai Qi Yao", Shaanxi University of Chinese Medicine, Xianyang, 712046, PR China.
| | - Xiaomei Song
- School of Pharmacy, Shaanxi Key Laboratory of Research and Application of "Taibai Qi Yao", Shaanxi University of Chinese Medicine, Xianyang, 712046, PR China.
| | - Dongdong Zhang
- School of Pharmacy, Shaanxi Key Laboratory of Research and Application of "Taibai Qi Yao", Shaanxi University of Chinese Medicine, Xianyang, 712046, PR China.
| |
Collapse
|
2
|
Paola EL, Borum A, Podunavac M, Zakarian A. Stereoselective Synthesis of α-Fluoro Carboxylic Acids by Ireland-Claisen Rearrangement. Org Lett 2023; 25:6167-6171. [PMID: 37590527 DOI: 10.1021/acs.orglett.3c01276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Stereoselective synthesis of α-fluoro carboxylic acids by the Ireland-Claisen rearrangement can provide a straightforward approach to this class of compounds. We report a systematic investigation of base-dependent stereocontrol in the Ireland-Claisen rearrangement of α-fluoro esters. For substrates with various substitution patterns, the use of KN(SiMe3)2 in toluene afforded rearrangement products corresponding to the (Z)-enolate intermediate with a practically useful diastereoselectivity and yield. In contrast, lower yields and diastereoselectivity were consistently observed with the use of lithium diisopropylamide (LDA) in tetrahydrofuran (THF).
Collapse
Affiliation(s)
- Elena L Paola
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Alana Borum
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Maša Podunavac
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| |
Collapse
|
3
|
Kaur A, Thakur S, Deswal G, Chopra B, Dhingra AK, Guarve K, Grewal AS. In silico docking based screening of constituents from Persian shallot as modulators of human glucokinase. J Diabetes Metab Disord 2023; 22:547-570. [PMID: 37255832 PMCID: PMC10225407 DOI: 10.1007/s40200-022-01176-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 12/16/2022] [Indexed: 06/01/2023]
Abstract
Purpose Small molecule glucokinase (GK) modulators not only decrease fasting and basal plasma sugar contents but also progress glucose tolerance. The hydro-ethanolic extract of the Persian shallot (Allium hirtifolium Boiss.) decreased blood glucose, improved plasma insulin and amplified GK action. The present study was proposed to screen phytoconstituents from Persian shallot as human GK activators using in silico docking studies. Methods A total of 91 phytoconstituents reported in Persian shallot (A. hirtifolium Boiss.) were assessed in silico for the prediction of drug-like properties and molecular docking investigations were carried out with human GK using AutoDock vina with the aim of exploring the binding interactions between the phytoconstituents and GK enzyme followed by in silico prediction of toxicity. Results Almost all the phytoconstituents tested showed good pharmacokinetic parameters for oral bioavailability and drug-likeness. In the docking analysis, cinnamic acid, methyl 3,4,5-trimethoxy benzoate, quercetin, kaempferol, kaempferol 3-O-β-D-glucopyranosyl-(1- > 4)-glucopyranoside, 5-hydroxy-methyl furfural, ethyl N-(O-anisyl) formimidate, 2-pyridinethione and ascorbic acid showed appreciable hydrogen bond and hydrophobic type interactions with the allosteric site residues of the GK enzyme. Conclusion These screened phytoconstituents may serve as promising hit molecules for further development of clinically beneficial and safe allosteric activators of the human GK enzyme.
Collapse
Affiliation(s)
- Anmol Kaur
- Guru Gobind Singh College of Pharmacy, Yamunanagar, Haryana India
| | - Shivani Thakur
- Guru Gobind Singh College of Pharmacy, Yamunanagar, Haryana India
| | - Geeta Deswal
- Guru Gobind Singh College of Pharmacy, Yamunanagar, Haryana India
| | - Bhawna Chopra
- Guru Gobind Singh College of Pharmacy, Yamunanagar, Haryana India
| | | | - Kumar Guarve
- Guru Gobind Singh College of Pharmacy, Yamunanagar, Haryana India
| | | |
Collapse
|
4
|
Anthony Ammal SM, Sudha S, Rajkumar D, Baskaran A, Krishnamoorthy G, Anbumozhi MK. In Silico Molecular Docking Studies of Phytocompounds From Coleus Amboinicus Against Glucokinase. Cureus 2023; 15:e34507. [PMID: 36874339 PMCID: PMC9984118 DOI: 10.7759/cureus.34507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
Diabetes is one of the most prevalent metabolic illnesses that can be fatal, and it is the ninth-largest cause of mortality worldwide. Even though there are effective hypoglycemic medications available for the treatment of diabetes, researchers continue to look for a medication that is more effective and has fewer adverse effects by focusing on various metabolic components such as enzymes, transporters, receptors. The enzyme Glucokinase (GCK), which is present mainly in the liver and beta cells of the pancreas, is involved in maintaining blood glucose homeostasis. Hence, the present in silico study is designed to determine the interaction between GCK and compounds (ligands) of Coleus amboinicus. In the current docking investigation, we discovered that important residues, including ASP-205, LYS-169, GLY-181, and ILE-225, significantly influence in ligand binding affinity. Docking tests of these compounds with target proteins revealed that this is a suitable molecule that docks well with the target of diabetes treatment. In conclusion, we believe that the compounds of caryophyllene have anti-diabetic activity based on the present study.
Collapse
Affiliation(s)
- Soosai Marian Anthony Ammal
- Department of Anatomy, Karpaga Vinayaga Institute of Medical Sciences and Research Centre, Maduranthagam, IND
| | - Sai Sudha
- Department of Pathology, Sree Balaji Medical College and Hospital, Chennai, IND
| | - Durairaj Rajkumar
- Department of Anatomy, Karpaga Vinayaga Institute of Medical Sciences and Research Centre, Maduranthagam, IND
| | - Adhithya Baskaran
- Department of Oral Pathology, Adhiparasakthi Dental College and Hospital, Chennai, IND
| | - Gunasekaran Krishnamoorthy
- Department of Medical Biochemistry, College of Medical and Health Sciences, Dambi Dollo University, Oromia Region, ETH
| | | |
Collapse
|
5
|
Kaiser M, Schönbauer D, Schragl K, Weil M, Gaertner P, Enev VS. Efforts toward the Total Synthesis of Elisabethin A. J Org Chem 2022; 87:15333-15349. [PMID: 36283031 PMCID: PMC9680034 DOI: 10.1021/acs.joc.2c01914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We describe our efforts toward the total synthesis of the natural product elisabethin A. The first route was guided by the proposed biosynthesis, assembling the 6,6-ring system before forming the five-membered ring including the quaternary carbon. The second approach includes a high yielding cyclization under Mitsunobu conditions as a key step. It allowed the preparation of an unusual and highly functionalized bicyclic 6,5-spiro compound. Both routes share a common advanced precursor obtained from an "underdeveloped" Claisen rearrangement of an aryl dienyl ether.
Collapse
Affiliation(s)
- Maximilian Kaiser
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria,
| | - David Schönbauer
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Katharina Schragl
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Matthias Weil
- Institute
of Chemical Technologies and Analytics, TU Wien, Getreidemarkt
9/164, 1060Wien, Austria
| | - Peter Gaertner
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Valentin S. Enev
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria,
| |
Collapse
|
6
|
Lerrick RI. Synthesis of Nonsteroidal Anti-Inflammatory Drug (NSAID) 2,4,5-Trimethoxybenzaldehyde from Indonesian Calamus oil and Its In Silico Pharmacokinetic Study. CAN J CHEM 2022. [DOI: 10.1139/cjc-2022-0121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Seeking Nonsteroidal anti-inflammatory painkillers are in the race due to the escalating cases of the life-threatening COVID-19 pandemic. Those current Nonsteroidal Anti-inflammatory Drugs (NSAIDs) used as an inflammation adjunct treatment on the COVID-19 patients including Paracetamol, Ibuprofen, and Celecoxib, are still under dispute offering emergency development of a new potent NSAID. Meanwhile, a well-known COX-2 selective anti-inflammation 2,4,5-trimethoxybenzaldehye has not been developed further in terms of its synthetic methodology and as well its pharmacokinetic studies. Here, an article on the synthesis of 2,4,5-trimethoxybenzaldehyde from Indonesia Sweet Flag (Acorus calamus) and as well its pharmacokinetic properties studied through in silico calculation was published. A typical Asian tetraploid calamus oil was yielded in 90% pure after doing reduced pressure distillation of the crude Indonesian Sweet flag oil. Submission of that oil into a very cheap DIY ozone machine produced 95% of pure 2,4,5-trimethoxybenzaldehyde just in 10 minutes ozonised. The in silico Adsorption, Distribution, Metabolism, Excretion, and Toxicity (ADMET) prediction using free access ADMETlab 2.0 web server strongly recommended the 2,4,5-trimethoxybenzaldehyde to be an orally administered NSAID candidate.
Collapse
Affiliation(s)
- Reinner Ishaq Lerrick
- University of Nusa Cendana Faculty of Science and Engineering, 562405, School of Chemistry, Kupang, East Nusa Tenggara, Indonesia
| |
Collapse
|
7
|
Abstract
The synthetic utility of rearrangement reactions in total synthesis for the rapid construction of core skeletons, the precise control of stereochemistry, and the identification of suitable synthons has been discussed.
Collapse
Affiliation(s)
- Lu Chen
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Guang Li
- State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Liansuo Zu
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| |
Collapse
|
8
|
Okuyama Y, Kidena M, Kato E, Kawano S, Ishii K, Maie K, Miura K, Simizu S, Sato T, Chida N. Seven-Step Synthesis of All-Nitrogenated Sugar Derivatives Using Sequential Overman Rearrangements. Angew Chem Int Ed Engl 2021; 60:5193-5198. [PMID: 33252821 DOI: 10.1002/anie.202015141] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Indexed: 11/10/2022]
Abstract
All-nitrogenated sugars (ANSs), in which all hydroxy groups in a carbohydrate are replaced with amino groups, are anticipated to be privileged structures with useful biological activities. However, ANS synthesis has been challenging due to the difficulty in the installation of multi-amino groups. We report herein the development of a concise synthetic route to peracetylated ANSs in seven steps from commercially available monosaccharides. The key to success is the use of the sequential Overman rearrangement, which enables formal simultaneous substitution of four or five hydroxy groups in monosaccharides with amino groups. A variety of ANSs are available through the same reaction sequence starting from different initial monosaccharides by chirality transfer of secondary alcohols. Transformations of the resulting peracetylated ANSs such as glycosylation and deacetylation are also demonstrated. Biological studies reveal that ANS-modified cholesterol show cytotoxicity against human cancer cell lines, whereas each ANS and cholesterol have no cytotoxicity.
Collapse
Affiliation(s)
- Yuya Okuyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Mayu Kidena
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Erina Kato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Sayaka Kawano
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Koki Ishii
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Kenta Maie
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Kazuki Miura
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Siro Simizu
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| |
Collapse
|
9
|
Okuyama Y, Kidena M, Kato E, Kawano S, Ishii K, Maie K, Miura K, Simizu S, Sato T, Chida N. Seven‐Step Synthesis of All‐Nitrogenated Sugar Derivatives Using Sequential Overman Rearrangements. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuya Okuyama
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Mayu Kidena
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Erina Kato
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Sayaka Kawano
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Koki Ishii
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Kenta Maie
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Kazuki Miura
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Siro Simizu
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Takaaki Sato
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Noritaka Chida
- Department of Applied Chemistry Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| |
Collapse
|
10
|
Wang Y, Zhang WY, Xie JH, Yu ZL, Tan JH, Zheng C, Hou XL, You SL. Enantioselective Desymmetrization of Bisphenol Derivatives via Ir-Catalyzed Allylic Dearomatization. J Am Chem Soc 2020; 142:19354-19359. [PMID: 33140959 DOI: 10.1021/jacs.0c09638] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Spirocyclic hexadienones with multiple stereogenic centers are frequently found in natural products but remain challenging targets to synthesize. Herein, we report the enantioselective desymmetrization of bisphenol derivatives via Ir-catalyzed allylic dearomatization reactions, affording spirocyclic hexadienone derivatives with up to three contiguous stereogenic centers in good yields (up to 90%) and excellent enantioselectivity (up to 99% ee). The high efficiency of this reaction is exemplified by the short reaction time (30 min), low catalyst loading (down to 0.2 mol %), and ability to perform the reaction on a gram-scale. The total syntheses of (+)-tatanan B and (+)-tatanan C were also realized using this Ir-catalyzed allylic dearomatization reaction as a key step.
Collapse
Affiliation(s)
- Ye Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Wen-Yun Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Jia-Hao Xie
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Zong-Lun Yu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Jia-Hao Tan
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Xue-Long Hou
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| |
Collapse
|
11
|
Kaczanowska K, Trzaskowski B, Peszczyńska A, Tracz A, Gawin R, Olszewski TK, Skowerski K. Cross metathesis with acrylates:
N
‐heterocyclic carbene (NHC)‐
versus
cyclic alkyl amino carbene (CAAC)‐based ruthenium catalysts, an unanticipated influence of the carbene type on efficiency and selectivity of the reaction. ChemCatChem 2020. [DOI: 10.1002/cctc.202001268] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | - Bartosz Trzaskowski
- Centre of New Technologies University of Warsaw Banacha 2c 02-097 Warszawa Poland
| | | | | | - Rafał Gawin
- Apeiron Synthesis SA Duńska 9 54-427 Wrocław Poland
| | - Tomasz K. Olszewski
- Wroclaw University of Science and Technology Faculty of Chemistry Wybrzeze Wyspianskiego 29 50-370 Wroclaw Poland
| | | |
Collapse
|
12
|
Wang Z. Palladium-catalyzed asymmetric dearomative cyclization in natural product synthesis. Org Biomol Chem 2020; 18:4354-4370. [PMID: 32459269 DOI: 10.1039/d0ob00818d] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Asymmetric catalysis is a rapidly growing field in modern organic chemistry and has been indispensable for the synthesis of enantioenriched materials to meet demands from the academies to pharmaceutical industries. Asymmetric dearomative cyclization catalyzed by transition metals has been a hot research area in the last decade. Fascinated by its ability to construct sterically hindered quaternary stereogenic center(s) through dearomatization and simultaneously forging new ring structure(s) through cyclization, palladium-catalyzed asymmetric dearomative cyclization has been applied to the synthesis of structurally complicated natural products and it is increasingly prevalent in the literature. In particular, the resultant product from dearomative cyclization, which usually carries one or more unsaturated C-C bond(s), allows further functional group transformations. Previously reported applications of palladium-catalyzed asymmetric dearomative cyclization in natural product synthesis are presented here and discussed in depth.
Collapse
Affiliation(s)
- Zhuo Wang
- Southern University of Science and Technology, School of Medicine, Shenzhen, 518055, People's Republic of China.
| |
Collapse
|
13
|
Bai Y, Sun Y, Xie J, Li B, Bai Y, Zhang D, Liang J, Xiao C, Zhong A, Cao Y, Zheng X. The asarone-derived phenylpropanoids from the rhizome of Acorus calamus var. angustatus Besser. PHYTOCHEMISTRY 2020; 170:112212. [PMID: 31785552 DOI: 10.1016/j.phytochem.2019.112212] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 11/15/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
Phenylpropanoids comprise a broad spectrum of biologically active natural products. As part of our ongoing research on antiepileptic active compounds from traditional Chinese herb, Acorus calamus var. angustatus Besser, three undescribed phenylpropanoids and twenty-two known ones were isolated. All the undescribed structures were determined by a combination of 1D and 2D NMR, HRMS. In addition, γ-asaronol was identified as racemates and its absolute configuration were determined by the modified Mosher's method and ECD spectral data. Furthermore, some selected isolated compounds were evaluated for their cell viability and neuroprotective activities in H2O2-induced SH-SY5Y cells. α-Asaronol, β-asaronol, 3-(2,4,5-trimethoxyphenyl)propan-1-ol and 1,2,4-trimethoxy-5-(3-methoxypropyl)benzene exerted potential protective activity from neuronal oxidative stress in all test concentrations ranging from 0.01 to 100 μM, in which the neuroprotective activity of β-asaronol was the best.
Collapse
Affiliation(s)
- Yajun Bai
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, PR China; Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, PR China
| | - Ying Sun
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, PR China
| | - Jing Xie
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, PR China
| | - Bin Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, PR China
| | - Yujun Bai
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, PR China
| | - Dongxu Zhang
- Department of Medicinal Chemistry, School of Pharmacy Fourth Military Medical University, Xi'an, 710032, PR China
| | - Jing Liang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, PR China
| | - Chaoni Xiao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, PR China
| | - Aiguo Zhong
- College of Pharmaceutical, Chemical and Materials Engineering, Taizhou University, Taizhou, 317000, PR China
| | - Yanjun Cao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, PR China.
| | - Xiaohui Zheng
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, PR China.
| |
Collapse
|
14
|
Ghotekar GS, Shirsath SR, Shaikh AC, Muthukrishnan M. 1,6-Conjugate addition initiated formal [4+2] annulation of p-quinone methides with sulfonyl allenols: a unique access to spiro[5.5]undeca-1,4-dien-3-one scaffolds. Chem Commun (Camb) 2020; 56:5022-5025. [DOI: 10.1039/d0cc01005g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An expedient one-pot synthesis of carbocyclic spiro[5.5]undeca-1,4-dien-3-ones via 1,6-conjugate addition initiated formal [4+2] annulation sequences by employing p-quinone methides and sulfonyl allenols.
Collapse
Affiliation(s)
- Ganesh S. Ghotekar
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Sachin R. Shirsath
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Aslam C. Shaikh
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - M. Muthukrishnan
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| |
Collapse
|
15
|
Sternisha SM, Miller BG. Molecular and cellular regulation of human glucokinase. Arch Biochem Biophys 2019; 663:199-213. [PMID: 30641049 DOI: 10.1016/j.abb.2019.01.011] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/09/2019] [Accepted: 01/10/2019] [Indexed: 01/23/2023]
Abstract
Glucose metabolism in humans is tightly controlled by the activity of glucokinase (GCK). GCK is predominantly produced in the pancreas, where it catalyzes the rate-limiting step of insulin secretion, and in the liver, where it participates in glycogen synthesis. A multitude of disease-causing mutations within the gck gene have been identified. Activating mutations manifest themselves in the clinic as congenital hyperinsulinism, while loss-of-function mutations produce several diabetic conditions. Indeed, pharmaceutical companies have shown great interest in developing GCK-associated treatments for diabetic patients. Due to its essential role in maintaining whole-body glucose homeostasis, GCK activity is extensively regulated at multiple levels. GCK possesses a unique ability to self-regulate its own activity via slow conformational dynamics, which allows for a cooperative response to glucose. GCK is also subject to a number of protein-protein interactions and post-translational modification events that produce a broad range of physiological consequences. While significant advances in our understanding of these individual regulatory mechanisms have been recently achieved, how these strategies are integrated and coordinated within the cell is less clear. This review serves to synthesize the relevant findings and offer insights into the connections between molecular and cellular control of GCK.
Collapse
Affiliation(s)
- Shawn M Sternisha
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Brian G Miller
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA.
| |
Collapse
|
16
|
Zhao JQ, Yang L, You Y, Wang ZH, Xie KX, Zhang XM, Xu XY, Yuan WC. Phosphine-catalyzed dearomative (3 + 2) annulation of 2-nitrobenzofurans and nitrobenzothiophenes with allenoates. Org Biomol Chem 2019; 17:5294-5304. [DOI: 10.1039/c9ob00775j] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Ph2PMe-catalyzed dearomative (3 + 2) annulation of 2-nitrobenzofurans, 2-nitrobenzothiophenes, and 3-nitrobenzothiophenes with allenoates is reported.
Collapse
Affiliation(s)
- Jian-Qiang Zhao
- Institute for Advanced Study
- Chengdu University
- Chengdu 610106
- China
| | - Lei Yang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Yong You
- Institute for Advanced Study
- Chengdu University
- Chengdu 610106
- China
| | - Zhen-Hua Wang
- Institute for Advanced Study
- Chengdu University
- Chengdu 610106
- China
| | - Ke-Xin Xie
- Chengdu Institute of Biology
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiao-Mei Zhang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Xiao-Ying Xu
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| | - Wei-Cheng Yuan
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu
- China
| |
Collapse
|
17
|
Podunavac M, Lacharity JJ, Jones KE, Zakarian A. Stereodivergence in the Ireland–Claisen Rearrangement of α-Alkoxy Esters. Org Lett 2018; 20:4867-4870. [DOI: 10.1021/acs.orglett.8b02011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Maša Podunavac
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Jacob J. Lacharity
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Kerry E. Jones
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| |
Collapse
|
18
|
Yao X, Ling Y, Guo S, Wu W, He S, Zhang Q, Zou M, Nandakumar KS, Chen X, Liu S. Tatanan A from the Acorus calamus L. root inhibited dengue virus proliferation and infections. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2018; 42:258-267. [PMID: 29655694 DOI: 10.1016/j.phymed.2018.03.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 01/08/2018] [Accepted: 03/08/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Acorus calamus l. (Acoraceae) is a well-known traditional Chinese medicinal plant, whose root are historically mainly used to treat neurodegenerative diseases, and for cholera treatment. This datum strongly indicates the antimicrobial activity of A. calamus. PURPOSE Our goal is to find the active constituents of A. calamus to treat dengue virus (DENV) infections, and to study the effects and mechanisms of these active substances. METHODS The root of A. calamus was extracted by ethanol. Mosquito larva C6/36 cells were used for DENV2 replication and transfection host. Mouse kidney fibroblast cells (BHK-21) were used as a host cell to study the infection ability of the virus. DENV2-induced cytopathic effect (CPE) and plaque assay were used to evaluate the inhibitory effect of A. calamus extracts on DENV2 infectivity inhibition. The levels of E and NS1 protein expression were measured by real-time PCR and western blot assays. RESULTS 12 compounds were isolated from ethanol extract of A. calamus root, tatanan A showed the best anti-DENV ability among these 12 compounds, which significantly alleviated DENV2-induced CPE and cytotoxicity effects, with an EC50 of 3.9 µM. In addition, RNA replication assay further confirmed the antivirus ability of tatanan A. Time-addition assay showed that tatanan A affected the early stage of viral RNA replication, which in turn inhibited mRNA and protein levels of DENV2. CONCLUSIONS These results demonstrated the anti-DENV2 effect of tatanan A, in inhibiting DENV2 RNA replication and infections. In summary, tatanan A was found to be a novel natural DENV inhibitor and a potential candidate for the treatment of DENV infectious disease.
Collapse
Affiliation(s)
- Xingang Yao
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Yun Ling
- Department of Pharmaceutical and Life Sciences, Jiujiang University, Jiujiang 332005, PR China.
| | - Songxin Guo
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Wenyu Wu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, PR China
| | - Shijun He
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Qing Zhang
- Department of Pharmaceutical and Life Sciences, Jiujiang University, Jiujiang 332005, PR China
| | - Min Zou
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Kutty Selva Nandakumar
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Xiaoguang Chen
- School of Public Health, Southern Medical University, Southern Medical University, Guangzhou 510515, PR China
| | - Shuwen Liu
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China.
| |
Collapse
|
19
|
Horwitz MA, Johnson JS. Local Desymmetrization through Diastereotopic Group Selection: An Enabling Strategy for Natural Product Synthesis. European J Org Chem 2017; 2017:1381-1390. [PMID: 28533701 PMCID: PMC5437555 DOI: 10.1002/ejoc.201601481] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Indexed: 12/22/2022]
Abstract
The application of desymmetrization strategies in chemical synthesis has allowed fundamentally new synthetic sequences that efficiently create dense and polyfunctional stereochemical arrays. Enantiotopic group discrimination has become a well-established method of global desymmetrization, while the conceptually unique strategy of local desymmetrization by diastereotopic group discrimination has its own advantages. This microreview focuses on the application of local desymmetrization in natural product synthesis and places a particular emphasis on the efficiency engendered by diastereotopic group discrimination. Local desymmetrization is subdivided into three distinct manifolds; examples under each paradigm are presented and compared.
Collapse
Affiliation(s)
- Matthew A Horwitz
- Department of Chemistry, The University of North Carolina at Chapel Hill Chapel Hill, NC 27599 (USA)
| | - Jeffrey S Johnson
- Department of Chemistry, The University of North Carolina at Chapel Hill Chapel Hill, NC 27599 (USA)
| |
Collapse
|
20
|
Kumar D, Das O, Kaurav MS, Khan T. Synthetic studies en route to the first total synthesis of a naturally occurring quinone from Acorus gramineus, iso-merrilliaquinone, iso-magnoshinin and 2-epi-3,4-dihydro magnoshinin. RSC Adv 2017. [DOI: 10.1039/c7ra05148d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An elegant Diels–Alder based approach has been demonstrated for the first racemic total synthesis of gramineusquinone B, iso-merrilliaquinone, iso-magnoshinin and 2-epi-3,4-dihydro magnoshinin.
Collapse
Affiliation(s)
- Dileep Kumar
- Organic Synthesis Laboratory
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Jatni-752050
- India
| | - Oindreela Das
- Organic Synthesis Laboratory
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Jatni-752050
- India
| | - Manvendra Singh Kaurav
- Organic Synthesis Laboratory
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Jatni-752050
- India
| | - Tabrez Khan
- Organic Synthesis Laboratory
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Jatni-752050
- India
| |
Collapse
|
21
|
Noble A, Roesner S, Aggarwal VK. Short Enantioselective Total Synthesis of Tatanan A and 3-epi-Tatanan A Using Assembly-Line Synthesis. Angew Chem Int Ed Engl 2016; 55:15920-15924. [PMID: 27865037 PMCID: PMC5215435 DOI: 10.1002/anie.201609598] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Indexed: 12/14/2022]
Abstract
Short and highly stereoselective total syntheses of the sesquilignan natural product tatanan A and its C3 epimer are described. An assembly-line synthesis approach, using iterative lithiation-borylation reactions, was applied to install the three contiguous stereocenters with high enantio- and diastereoselectivity. One of the stereocenters was installed using a configurationally labile lithiated primary benzyl benzoate, resulting in high levels of substrate-controlled (undesired) diastereoselectivity. However, reversal of selectivity was achieved by using a novel diastereoselective Matteson homologation. Stereospecific alkynylation of a hindered secondary benzylic boronic ester enabled completion of the synthesis in a total of eight steps.
Collapse
Affiliation(s)
- Adam Noble
- School of ChemistryUniversity of Bristol, Cantock's CloseBristolBS8 1TSUK
| | - Stefan Roesner
- School of ChemistryUniversity of Bristol, Cantock's CloseBristolBS8 1TSUK
| | | |
Collapse
|
22
|
Noble A, Roesner S, Aggarwal VK. Short Enantioselective Total Synthesis of Tatanan A and 3-epi-Tatanan A Using Assembly-Line Synthesis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609598] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Adam Noble
- School of Chemistry; University of Bristol, Cantock's Close; Bristol BS8 1TS UK
| | - Stefan Roesner
- School of Chemistry; University of Bristol, Cantock's Close; Bristol BS8 1TS UK
| | | |
Collapse
|
23
|
Ling T, Rivas F. All-carbon quaternary centers in natural products and medicinal chemistry: recent advances. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.09.002] [Citation(s) in RCA: 155] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
24
|
Nugent J, Banwell MG, Schwartz BD. Total Synthesis of the Illicium-Derived Sesquineolignan Simonsol C. Org Lett 2016; 18:3798-801. [DOI: 10.1021/acs.orglett.6b01799] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeremy Nugent
- Research
School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Martin G. Banwell
- Research
School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Brett D. Schwartz
- Research
School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| |
Collapse
|
25
|
Marset A, Caprioglio D, Torretta S, Appendino G, Minassi A. Synthesis of colchifulvin, a colchicine–griseofulvin hybrid. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
26
|
Cichowicz NR, Kaplan W, Khomutnyk Y, Bhattarai B, Sun Z, Nagorny P. Concise Enantioselective Synthesis of Oxygenated Steroids via Sequential Copper(II)-Catalyzed Michael Addition/Intramolecular Aldol Cyclization Reactions. J Am Chem Soc 2015; 137:14341-8. [PMID: 26491886 PMCID: PMC4651737 DOI: 10.1021/jacs.5b08528] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A new scalable enantioselective approach to functionalized oxygenated steroids is described. This strategy is based on chiral bis(oxazoline) copper(II) complex-catalyzed enantioselective and diastereoselective Michael reactions of cyclic ketoesters and enones to install vicinal quaternary and tertiary stereocenters. In addition, the utility of copper(II) salts as highly active catalysts for the Michael reactions of traditionally unreactive β,β'-enones and substituted β,β'-ketoesters that results in unprecedented Michael adducts containing vicinal all-carbon quaternary centers is also demonstrated. The Michael adducts subsequently undergo base-promoted diastereoselective aldol cascade reactions resulting in the natural or unnatural steroid skeletons. The experimental and computational studies suggest that the torsional strain effects arising from the presence of the Δ(5)-unsaturation are key controlling elements for the formation of the natural cardenolide scaffold. The described method enables expedient generation of polycyclic molecules including modified steroidal scaffolds as well as challenging-to-synthesize Hajos-Parrish and Wieland-Miescher ketones.
Collapse
Affiliation(s)
- Nathan R. Cichowicz
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| | - Will Kaplan
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| | - Yaroslav Khomutnyk
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| | - Bijay Bhattarai
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| | - Zhankui Sun
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| | - Pavel Nagorny
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| |
Collapse
|
27
|
Smits G, Kinens A, Zemribo R. Ireland-Claisen Rearrangement of 6-Methylene-1,4-oxazepan-2-ones. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500918] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
28
|
Roesner S, Blair DJ, Aggarwal VK. Enantioselective installation of adjacent tertiary benzylic stereocentres using lithiation-borylation-protodeboronation methodology. Application to the synthesis of bifluranol and fluorohexestrol. Chem Sci 2015; 6:3718-3723. [PMID: 29218141 PMCID: PMC5707455 DOI: 10.1039/c4sc03901g] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 04/11/2015] [Indexed: 12/14/2022] Open
Abstract
1,2-Diaryl ethanes bearing 1,2-stereogenic centres show interesting biological activity but their stereocontrolled synthesis has not been reported forcing a reliance of methods involving diastereomer and enantiomer separation. We have found that this class of molecules can be prepared with very high stereocontrol using lithiation-borylation methodology. The reaction of an enantioenriched benzylic lithiated carbamate with an enantioenriched benzylic secondary pinacol boronic ester gave a tertiary boronic ester with complete diastereo- and enantiocontrol. It was essential to use MgBr2/MeOH after formation of the boronate complex, both to promote the 1,2-migration and to trap any lithiated carbamate/benzylic anion that formed from fragmentation of the ate complex, anions that would otherwise racemise and re-form the boronate complex eroding both er and dr of the product. When the benzylic lithiated carbamate and benzylic secondary pinacol boronic ester were too hindered, boronate complex did not even form. In these cases, it was found that the use of the less hindered neopentyl boronic esters enabled successful homologation to take place even for the most hindered reaction partners, with high stereocontrol and without the need for additives. Protodeboronation of the product boronic esters with TBAF gave the target 1,2-diaryl ethanes bearing 1,2-stereogenic centres. The methodology was applied to the stereocontrolled synthesis of bifluranol and fluorohexestrol in just 7 and 5 steps, respectively.
Collapse
Affiliation(s)
- Stefan Roesner
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; ; Tel: +44 (0)117 954 6315
| | - Daniel J Blair
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; ; Tel: +44 (0)117 954 6315
| | - Varinder K Aggarwal
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; ; Tel: +44 (0)117 954 6315
| |
Collapse
|
29
|
Bailey GA, Fogg DE. Acrylate metathesis via the second-generation Grubbs catalyst: unexpected pathways enabled by a PCy3-generated enolate. J Am Chem Soc 2015; 137:7318-21. [PMID: 26030596 DOI: 10.1021/jacs.5b04524] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The diverse applications of acrylate metathesis range from synthesis of high-value α,β-unsaturated esters to depolymerization of unsaturated polymers. Examined here are unexpected side reactions promoted by the important Grubbs catalyst GII. Evidence is presented for attack of PCy3 on the acrylate olefin to generate a reactive carbanion, which participates in multiple pathways, including further Michael addition, proton abstraction, and catalyst deactivation. Related chemistry may be anticipated whenever labile metal-phosphine complexes are used to catalyze reactions of substrates bearing an electron-deficient olefin.
Collapse
Affiliation(s)
- Gwendolyn A Bailey
- Center for Catalysis Research and Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N6N5 Canada
| | - Deryn E Fogg
- Center for Catalysis Research and Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N6N5 Canada
| |
Collapse
|
30
|
Du K, Guo P, Chen Y, Cao Z, Wang Z, Tang W. Enantioselective Palladium-Catalyzed Dearomative Cyclization for the Efficient Synthesis of Terpenes and Steroids. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411817] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
31
|
Du K, Guo P, Chen Y, Cao Z, Wang Z, Tang W. Enantioselective Palladium-Catalyzed Dearomative Cyclization for the Efficient Synthesis of Terpenes and Steroids. Angew Chem Int Ed Engl 2015; 54:3033-7. [DOI: 10.1002/anie.201411817] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Indexed: 11/06/2022]
|
32
|
Wu XX, Shen Y, Chen WL, Chen S, Xu PF, Liang YM. Palladium-catalyzed dearomative cyclization by a norbornene-mediated sequence: a route to spiroindolenine derivatives. Chem Commun (Camb) 2015; 51:16798-801. [DOI: 10.1039/c5cc07411h] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Spiroindolenine derivatives bearing an all-carbon quaternary spirocenter are synthesizedviaa Pd-catalyzed norbornene-mediated tandemortho-alkylation dearomative cyclization reaction.
Collapse
Affiliation(s)
- Xin-Xing Wu
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Yi Shen
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Wen-Long Chen
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Si Chen
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| |
Collapse
|
33
|
Feng XL, Yu Y, Qin DP, Gao H, Yao XS. Acorus Linnaeus: a review of traditional uses, phytochemistry and neuropharmacology. RSC Adv 2015. [DOI: 10.1039/c4ra12049c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Acorus Linnaeus is a herb used in many ancient medicinal systems. Phytochemical and neuropharmacological studies have revealed that many beneficial compounds possessed anticonvulsant, antiepileptic, neuroprotective, memory enhancing, and sedative properties.
Collapse
Affiliation(s)
- Xiao-Lin Feng
- Institute of Traditional Chinese Medicine & Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Yang Yu
- Institute of Traditional Chinese Medicine & Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Da-Peng Qin
- Institute of Traditional Chinese Medicine & Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Hao Gao
- Institute of Traditional Chinese Medicine & Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Xin-Sheng Yao
- Institute of Traditional Chinese Medicine & Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| |
Collapse
|
34
|
Abstract
The concise total synthesis of aplykurodinone-1 with an unusual cis-fused hydrindane moiety has been accomplished without the need for any protecting group chemistry using a unique SmI2 mediated reductive cascade cyclization reaction and a direct cuprate mediated 1,4-addition. This work represents the first example of the use of a SmI2-mediated intramolecular cascade cyclization reaction between "halide, alkene and aldehyde" groups.
Collapse
Affiliation(s)
- Gang Liu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
| | | | | | | | | | | |
Collapse
|
35
|
Focken T, Hanessian S. Application of cyclic phosphonamide reagents in the total synthesis of natural products and biologically active molecules. Beilstein J Org Chem 2014; 10:1848-77. [PMID: 25246946 PMCID: PMC4168934 DOI: 10.3762/bjoc.10.195] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 06/26/2014] [Indexed: 12/12/2022] Open
Abstract
A review of the synthesis of natural products and bioactive compounds adopting phosphonamide anion technology is presented highlighting the utility of phosphonamide reagents in stereocontrolled bond-forming reactions. Methodologies utilizing phosphonamide anions in asymmetric alkylations, Michael additions, olefinations, and cyclopropanations will be summarized, as well as an overview of the synthesis of the employed phosphonamide reagents.
Collapse
Affiliation(s)
- Thilo Focken
- Xenon Pharmaceuticals Inc., 3650 Gilmore Way, Burnaby, BC V5G 4W8, Canada
| | - Stephen Hanessian
- Department of Chemistry, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
| |
Collapse
|
36
|
Grenning AJ, Boyce JH, Porco JA. Rapid synthesis of polyprenylated acylphloroglucinol analogs via dearomative conjunctive allylic annulation. J Am Chem Soc 2014; 136:11799-804. [PMID: 25061804 PMCID: PMC4140454 DOI: 10.1021/ja5060302] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
![]()
Polyprenylated
acylphloroglucinols (PPAPs) are structurally complex
natural products with promising biological activities. Herein, we
present a biosynthesis-inspired, diversity-oriented synthesis approach
for rapid construction of PPAP analogs via double decarboxylative
allylation (DcA) of acylphloroglucinol scaffolds to access allyl-desoxyhumulones
followed by dearomative conjunctive allylic alkylation (DCAA).
Collapse
Affiliation(s)
- Alexander J Grenning
- Department of Chemistry, Center for Chemical Methodology and Library Development (CMLD-BU), Boston University , 590 Commonwealth Ave., Boston, Massachusetts 02215, United States
| | | | | |
Collapse
|
37
|
Wang R, Paddon-Row MN, Sherburn MS. Short Synthesis of 3-(Hydroxymethyl)xylitol and Structure Revision of the Anti-diabetic Natural Product from Casearia esculenta. Org Lett 2013; 15:5610-2. [DOI: 10.1021/ol402740m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ruomeng Wang
- Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia
| | - Michael N. Paddon-Row
- Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia
| | - Michael S. Sherburn
- Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia
| |
Collapse
|
38
|
|
39
|
Zhang X, Liu WB, Wu QF, You SL. Ruthenium-Catalyzed Intramolecular Allylic Dearomatization Reaction of Indole Derivatives. Org Lett 2013; 15:3746-9. [DOI: 10.1021/ol4016578] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiao Zhang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Wen-Bo Liu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Qing-Feng Wu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| |
Collapse
|
40
|
Peng Y, Luo ZB, Zhang JJ, Luo L, Wang YW. Collective synthesis of several 2,7′-cyclolignans and their correlation by chemical transformations. Org Biomol Chem 2013; 11:7574-86. [DOI: 10.1039/c3ob41672k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
41
|
Wu KJ, Dai LX, You SL. Palladium(0)-catalyzed intramolecular dearomative arylation of pyrroles. Chem Commun (Camb) 2013; 49:8620-2. [DOI: 10.1039/c3cc44631j] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|