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Wu TJ, Lin CC, Ma LT, Yang CK, Ho CL, Wang SY, Chu FH. Functional identification of specialized diterpene synthases from Chamaecyparis obtusa and C. obtusa var. formosana to illustrate the putative evolution of diterpene synthases in Cupressaceae. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 344:112080. [PMID: 38582272 DOI: 10.1016/j.plantsci.2024.112080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/12/2024] [Accepted: 04/01/2024] [Indexed: 04/08/2024]
Abstract
Chamaecyparis obtusa and C. obtusa var. formosana of the Cupressaceae family are well known for their fragrance and excellent physical properties. To investigate the biosynthesis of unique diterpenoid compounds, diterpene synthase genes for specialized metabolite synthesis were cloned from C. obtusa and C. obtusa var. formosana. Using an Escherichia coli co-expression system, eight diterpene synthases (diTPSs) were characterized. CoCPS and CovfCPS are class II monofunctional (+)-copalyl diphosphate synthases [(+)-CPSs]. Class I monofunctional CoLS and CovfLS convert (+)-copalyl diphosphate [(+)-CPP] to levopimaradiene, CoBRS, CovfBRS1, and CovfBRS3 convert (+)-CPP to (-)-beyerene, and CovfSDS converts (+)-CPP to (-)-sandaracopimaradiene. These enzymes are all monofunctional diterpene syntheses in Cupressaceae family of gymnosperm, and differ from those in Pinaceae. The discovery of the enzyme responsible for the biosynthesis of tetracyclic diterpene (-)-beyerene was characterized for the first time. Diterpene synthases with different catalytic functions exist in closely related species within the Cupressaceae family, indicating that this group of monofunctional diterpene synthases is particularly prone to the evolution of new functions and development of species-specific specialized diterpenoid constituents.
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Affiliation(s)
- Tsai-Jung Wu
- School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan
| | - Chi-Chun Lin
- School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan
| | - Li-Ting Ma
- Academy of Circular Economy, National Chung-Hsing University, Taichung, Taiwan
| | - Chih-Kai Yang
- Department of Forestry, National Pingtung University of Science and Technology, Taipei, Taiwan
| | - Chen-Lung Ho
- Taiwan Forestry Research Institute, Taipei, Taiwan
| | - Sheng-Yang Wang
- Department of Forestry, National Chung-Hsing University, Taichung, Taiwan
| | - Fang-Hua Chu
- School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan.
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2
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Avula S, Ullah S, Halim SA, Khan A, Anwar MU, Csuk R, Al-Harrasi A, Rostami A. Meldrum-Based-1 H-1,2,3-Triazoles as Antidiabetic Agents: Synthesis, In Vitro α-Glucosidase Inhibition Activity, Molecular Docking Studies, and In Silico Approach. ACS OMEGA 2023; 8:24901-24911. [PMID: 37483205 PMCID: PMC10357758 DOI: 10.1021/acsomega.3c01291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 05/19/2023] [Indexed: 07/25/2023]
Abstract
A series of novel alkyl derivatives (2-5a,b) and 1H-1,2,3-triazole analogues (7a-k) of Meldrum's acid were synthesized in a highly effective way by using "click" chemistry and screened for in vitro α-glucosidase inhibitory activity to examine their antidiabetic potential. 1H NMR, 13C-NMR, and high-resolution electrospray ionization mass spectra (HR-ESI-MS) were used to analyze each of the newly synthesized compounds. Interestingly, these compounds demonstrated high to moderate α-glucosidase inhibitory potency having an IC50 range of 4.63-80.21 μM. Among these derivatives, compound 7i showed extraordinary inhibitory activity and was discovered to be several times more potent than the parent compound Meldrum (1) and the standard drug acarbose. Later, molecular docking was performed to understand the binding mode and the binding strength of all the compounds with the target enzyme, which revealed that all compounds are well fitted in the active site of α-glucosidase. To further ascertain the structure of compounds, suitable X-ray single crystals of compounds 5a, 7a, and 7h were developed and studied. The current investigation has shown that combining 1H-1,2,3-triazole with the Meldrum moiety is beneficial. Furthermore, this is the first time that the aforementioned activity of these compounds has been reported.
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Affiliation(s)
- Satya
Kumar Avula
- Natural
and Medical Sciences Research Center, University
of Nizwa, P.O. Box 33,
Postal Code 616, Birkat Al Mauz, Nizwa, Sultanate of Oman
| | - Saeed Ullah
- Natural
and Medical Sciences Research Center, University
of Nizwa, P.O. Box 33,
Postal Code 616, Birkat Al Mauz, Nizwa, Sultanate of Oman
| | - Sobia Ahsan Halim
- Natural
and Medical Sciences Research Center, University
of Nizwa, P.O. Box 33,
Postal Code 616, Birkat Al Mauz, Nizwa, Sultanate of Oman
| | - Ajmal Khan
- Natural
and Medical Sciences Research Center, University
of Nizwa, P.O. Box 33,
Postal Code 616, Birkat Al Mauz, Nizwa, Sultanate of Oman
| | - Muhammad U. Anwar
- Natural
and Medical Sciences Research Center, University
of Nizwa, P.O. Box 33,
Postal Code 616, Birkat Al Mauz, Nizwa, Sultanate of Oman
| | - René Csuk
- Organic
Chemistry, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany
| | - Ahmed Al-Harrasi
- Natural
and Medical Sciences Research Center, University
of Nizwa, P.O. Box 33,
Postal Code 616, Birkat Al Mauz, Nizwa, Sultanate of Oman
| | - Ali Rostami
- Natural
and Medical Sciences Research Center, University
of Nizwa, P.O. Box 33,
Postal Code 616, Birkat Al Mauz, Nizwa, Sultanate of Oman
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3
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Liang RX, Tang HW, Liu JL, Xu JF, Chen LJ, Jia YX. Cobalt-catalyzed enantioselective desymmetrizing reductive cyclization of alkynyl cyclodiketones. Chem Sci 2023; 14:6393-6398. [PMID: 37325142 PMCID: PMC10266457 DOI: 10.1039/d3sc00119a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 05/09/2023] [Indexed: 06/17/2023] Open
Abstract
A highly enantioselective cobalt-catalyzed desymmetrizing reductive cyclization of alkynyl cyclodiketones has been developed. Under mild reaction conditions by employing HBpin as a reducing agent and ferrocene-based PHOX as a chiral ligand, a series of polycyclic tertiary allylic alcohols bearing contiguous quaternary stereocenters are achieved in moderate to excellent yields with excellent enantioselectivities (up to 99%). Broad substrate scope and high functional group compatibility are observed in this reaction. A CoH-catalyzed pathway involving alkyne hydrocobaltation followed by nucleophilic addition to the C[double bond, length as m-dash]O bond is proposed. Synthetic transformations of the product are conducted to demonstrate the practical utilities of this reaction.
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Affiliation(s)
- Ren-Xiao Liang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology Chaowang Road 18# Hangzhou 310014 China
| | - Heng-Wei Tang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology Chaowang Road 18# Hangzhou 310014 China
| | - Jia-Liang Liu
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology Chaowang Road 18# Hangzhou 310014 China
| | - Jian-Feng Xu
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology Chaowang Road 18# Hangzhou 310014 China
| | - Ling-Jia Chen
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology Chaowang Road 18# Hangzhou 310014 China
| | - Yi-Xia Jia
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology Chaowang Road 18# Hangzhou 310014 China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences Shanghai 200032 P. R. China
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4
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Unprecedented Elimination Reactions of Cyclic Aldols: A New Biosynthetic Pathway toward the Taiwaniaquinoid Skeleton. Molecules 2023; 28:molecules28041524. [PMID: 36838511 PMCID: PMC9965844 DOI: 10.3390/molecules28041524] [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] [Received: 12/30/2022] [Revised: 01/20/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
The acid treatment of 6,7-seco-abietane dialdehydes gives, in high yield, the corresponding derivatives with the 4a-methyltetrahydrofluorene skeleton of taiwaniaquinoids. A mechanism involving the elimination of formic acid from the cyclic aldol intermediate is proposed here. This process can be postulated as a new biogenetic pathway from abietane diterpenes to taiwaniaquinoids. Using this novel reaction, the first enantiospecific synthesis of bioactive natural cupresol and taxodal has been obtained.
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5
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Chang CY, Chen CJ, Huang SH, Kao SC, Wu YK. Total Synthesis of (±)‐Taiwaniaquinol B through a Sequence of Fries Rearrangement and Photo‐Nazarov Cyclization. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100721] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chieh-Yu Chang
- National Yang Ming Chiao Tung University Department of Applied Chemistry TAIWAN
| | - Chun-Jen Chen
- National Yang Ming Chiao Tung University Department of Applied Chemistry TAIWAN
| | - Sheng-Hao Huang
- National Yang Ming Chiao Tung University Department of Applied Chemistry TAIWAN
| | - Shih-Chieh Kao
- National Yang Ming Chiao Tung University Department of Applied Chemistry TAIWAN
| | - Yen-Ku Wu
- National Yang Ming Chiao Tung University Department of Applied Chemistry 1001 University Road 30010 Hsinchu TAIWAN
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6
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7
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Zhang Y, Ji Y, Franzoni I, Guo C, Jia H, Hong B, Li H. Enantioselective Total Synthesis of Berkeleyone A and Preaustinoids. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yang Zhang
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Yunpeng Ji
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Ivan Franzoni
- NuChem Sciences 2350 rue Cohen Suite 201, Saint-Laurent Quebec H4R 2N6 Canada
| | - Chuning Guo
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Hongli Jia
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Benke Hong
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Houhua Li
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
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8
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Zhang Y, Ji Y, Franzoni I, Guo C, Jia H, Hong B, Li H. Enantioselective Total Synthesis of Berkeleyone A and Preaustinoids. Angew Chem Int Ed Engl 2021; 60:14869-14874. [PMID: 33856105 DOI: 10.1002/anie.202104014] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Indexed: 01/09/2023]
Abstract
Herein we report the first enantioselective total synthesis of 3,5-dimethylorsellinic acid-derived meroterpenoids (-)-berkeleyone A and its five congeners ((-)-preaustinoids A, A1, B, B1, and B2) in 12-15 steps, starting from commercially available 2,4,6-trihydroxybenzoic acid hydrate. Based upon the recognition of latent symmetry within D-ring, our convergent synthesis features two critical reactions: 1) a symmetry-breaking, diastereoselective dearomative alkylation to assemble the entire carbon core, and 2) a Sc(OTf)3 -mediated sequential Krapcho dealkoxycarbonylation/carbonyl α-tert-alkylation to forge the intricate bicyclo[3.3.1]nonane framework. We also conducted our preliminary biomimetic investigations and uncovered a series of rearrangements (α-ketol, α-hydroxyl-β-diketone, etc.) responsible for the biomimetic diversification of (-)-berkeleyone A into its five preaustinoid congeners.
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Affiliation(s)
- Yang Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yunpeng Ji
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Ivan Franzoni
- NuChem Sciences, 2350 rue Cohen Suite 201, Saint-Laurent, Quebec, H4R 2N6, Canada
| | - Chuning Guo
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Hongli Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Benke Hong
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Houhua Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
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9
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Alghamdi SS, Mustafa SM, Moore Ii BM. Synthesis and biological evaluation of a ring analogs of the selective CB2 inverse agonist SMM-189. Bioorg Med Chem 2021; 33:116035. [PMID: 33550084 DOI: 10.1016/j.bmc.2021.116035] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/14/2021] [Accepted: 01/16/2021] [Indexed: 12/23/2022]
Abstract
Microglia are the principle cell type driving sustained neuroinflammation in neurodegenerative diseases such as Alzheimer's, Parkinson's, and Multiple Sclerosis. Interestingly, microglia locked into a chronic M1 pro-inflammatory phenotype significantly up-regulate the cannabinoid receptor 2 (CB2) expression. Our approach to exploiting CB2 as a therapeutic target in neuroinflammatory diseases focuses on the development of selective CB2 inverse agonists to shift microglia bias to a M2 pro-wound healing phenotype. Herein we report work designed to refine the structure activity relationship of the 2,6-dihydroxy-biphenyl-aryl-methanone CB2 inverse agonist scaffold. A series of analogs of our lead compound SMM-189 were synthesized and measured for affinity/selectivity, potency, and efficacy in regulating cAMP production and β-arrestin recruitment. In this series compound 40 demonstrated a significant increase in potency and efficacy for cAMP stimulation compared to SMM-189. Akin to our lead SMM-189, this compound was highly efficacious in biasing microglia to an M2 pro-wound healing phenotype in LPS stimulated cell lines. These results advance our understanding of the structure-activity relationship of the 2,6-dihydroxy-biphenyl-aryl-methanone scaffold and provide further support for regulating microglia activation using CB2 inverse agonists.
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Affiliation(s)
- Sahar S Alghamdi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Suni M Mustafa
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Bob M Moore Ii
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
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10
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Jardim M, Baldassari LL, Contreira ME, Moro AV, Lüdtke DS. Boron/zinc exchange for the conjugate arylation of unsaturated Meldrum’s acid derivatives. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Yang S, Feng Y, Zhao S, Chen L, Li X, Zhang D, Liu H, Dong Y, Sun F. Palladium/Norbornene‐Catalyzed Sequential
ortho
‐Acylation and
ipso
‐Alkenylation with Carboxylic Acid: Access to Polysubstituted Aryl Ketones. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shimin Yang
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Yunxia Feng
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Shen Zhao
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Lei Chen
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Xinjin Li
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Daopeng Zhang
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Hui Liu
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Yunhui Dong
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Feng‐Gang Sun
- Affiliation a School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
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12
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Saini KM, Saunthwal RK, Sushmita, Verma AK. Synthesis of cyclopentaquinolinone and cyclopentapyridinone from ortho-alkynyl-N-arylaldehyde via superbase-promoted C-N, C-O and C-C bond formation. Org Biomol Chem 2020; 18:5594-5601. [PMID: 32644087 DOI: 10.1039/d0ob01281e] [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
An environmentally benign, transition metal-free, superbase-mediated intramolecular annulation of o-alkynylaldehydes with primary amines forms highly functionalized amino-substituted cyclopentaquinolinones and cyclopentapyridinones via C-N, C-C, and C[double bond, length as m-dash]O bond formation. Contrary to the traditional approaches of ring closures, a different mode of annulation is disclosed. The protocol involves the in situ generations of imine intermediate followed by potassium hydroxide-promoted intramolecular cyclization and subsequent dimethyl sulfoxide induced dehydrogenation leads to the formation of N-heterocycles. X-ray crystallographic studies support the assigned structures of the amino-fused N-heterocycles.
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13
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Saini KM, Saunthwal RK, Sushmita, Verma AK. Transition‐Metal‐Free Reverse Reactivity of (2‐Alkynyl)‐Arylaldimines: Assembly of Functionalized Amino‐Indinones. Chemistry 2020. [DOI: 10.1002/chem.201904294] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
| | - Rakesh K. Saunthwal
- Department of ChemistryUniversity of Delhi Delhi 110007 India
- School of ChemistryUniversity of Bristol Bristol BS8 1TS UK
| | - Sushmita
- Department of ChemistryUniversity of Delhi Delhi 110007 India
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14
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Xing S, Xia H, Guo J, Zou C, Gao T, Wang K, Zhu B, Pei M, Bai M. Diastereoselective Construction of 2-Aminoindanones via an In(OTf) 3-Catalyzed Domino Reaction. J Org Chem 2019; 84:8984-8997. [PMID: 31250644 DOI: 10.1021/acs.joc.9b00876] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An In(OTf)3-catalyzed domino reaction involving sequential oxidative ring opening of aziridines by using the solvent dimethyl sulfoxide and intramolecular Michael addition has been developed for the modular synthesis of 2-aminoindanone compounds by the formation of one new C═O bond and one new C-C bond. The notable feature of this strategy includes broad substrate scope, excellent trans-diastereoselectivities, highly functionalized products, and mild conditions. The catalyst In(OTf)3 plays an important role in the formation of the indanone ring.
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Affiliation(s)
- Siyang Xing
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
| | - Hanyu Xia
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
| | - Junshuo Guo
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
| | - Chenchen Zou
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
| | - Tingxuan Gao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
| | - Kui Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
| | - Bolin Zhu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
| | - Meiqi Pei
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
| | - Mengpei Bai
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry , Tianjin Normal University , Tianjin 300387 , People's Republic of China
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15
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Le Rouzo G, Morel-Grepet M, Simonato JP. Synthesis of 4-Tert-octylphenol and 4-Cumylphenol by Metal Triflate and Metal Triflimidate Catalysts. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823406778256342] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Metal triflates and metal triflimidates are shown to catalyse efficiently the Friedel–Crafts alkylation of phenol with alkenes. Bismuth, copper and scandium triflates lead to very good yields with excellent para-selectivities.
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Affiliation(s)
- Guillaume Le Rouzo
- RHODIA Organics, Centre de Recherches et de Technologies de Lyon 85, avenue des Frères Perret, 69192 Saint-Fons, France
| | - Marielle Morel-Grepet
- RHODIA Organics, Centre de Recherches et de Technologies de Lyon 85, avenue des Frères Perret, 69192 Saint-Fons, France
| | - Jean-Pierre Simonato
- RHODIA Organics, Centre de Recherches et de Technologies de Lyon 85, avenue des Frères Perret, 69192 Saint-Fons, France
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16
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Galaverna R, McBride T, Pastre JC, Browne DL. Exploring the generation and use of acylketenes with continuous flow processes. REACT CHEM ENG 2019. [DOI: 10.1039/c9re00072k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The generation and use of acyl ketenes under continuous flow reaction conditions is reported. Several reaction classes of these reactive intermediates have been studied. Under zero headspace conditions, a ketone exchange process is possible between volatile ketones. The process can be readily scaled to deliver gram quantities of product.
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Affiliation(s)
- Renan Galaverna
- School of Chemistry
- Cardiff University
- Cardiff CF10 3AT
- UK
- Institute of Chemistry
| | - Tom McBride
- School of Chemistry
- Cardiff University
- Cardiff CF10 3AT
- UK
| | - Julio C. Pastre
- Institute of Chemistry
- University of Campinas - UNICAMP
- Campinas
- Brazil
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17
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Harmalkar DS, Lu Q, Lee K. Total Synthesis of Gramistilbenoids A, B, and C. JOURNAL OF NATURAL PRODUCTS 2018; 81:798-805. [PMID: 29613790 DOI: 10.1021/acs.jnatprod.7b00865] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Stilbenes are biologically active metabolites of plants that have the potential to attenuate a broad range of human diseases. Gramistilbenoids are a class of natural products with a stilbene skeleton, isolated from the bamboo orchid ( Arundina graminifolia), and with significant cytotoxicity against cancer cell lines (NB4, A549, SHSY5Y, PC3, and MCF7). These are the first identified naturally occurring diphenylethylenes to possess a hydroxyethyl unit. However, some of these compounds are not abundant in nature, and thus, their synthesis is advantageous. This paper reports the first synthesis of gramistilbenoids A (1), B (2), and C (3), with overall yields of 10, 2, and 8% respectively. These natural products were synthesized using key reactions, such as Horner-Wadsworth-Emmons olefination, Stille coupling, and hydroboration-oxidation.
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Affiliation(s)
- Dipesh S Harmalkar
- College of Pharmacy , Dongguk University-Seoul , Goyang , 10326 , Republic of Korea
| | - Qili Lu
- College of Pharmacy , Dongguk University-Seoul , Goyang , 10326 , Republic of Korea
| | - Kyeong Lee
- College of Pharmacy , Dongguk University-Seoul , Goyang , 10326 , Republic of Korea
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18
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Abstract
An overview of the highlights in total synthesis of natural products using iridium as a catalyst is given.
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Affiliation(s)
- Changchun Yuan
- School of Chemical Engineering and Technology
- North University of China
- Taiyuan 030051
- PR China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
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19
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Carmichael RA, Sophanpanichkul P, Chalifoux WA. β-Silyl-Assisted Tandem Diels–Alder/Nazarov Reaction of 1-Aryl-3-(trimethylsilyl) Ynones. Org Lett 2017; 19:2592-2595. [DOI: 10.1021/acs.orglett.7b00911] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Rachael A. Carmichael
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
| | - Punyanuch Sophanpanichkul
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
| | - Wesley A. Chalifoux
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
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20
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Vajargahy MP, Dabiri M, Bazgir A. Carbon-based leaving group capability of Meldrum’s acid in substitution reactions: a new strategy toward the synthesis of 4-phenyl-3, 4-dihydro-2H-benzo[g]chromene-2, 5, 10-triones. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1129-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Guardia JJ, Tapia R, Mahdjour S, Rodriguez-Serrano F, Mut-Salud N, Chahboun R, Alvarez-Manzaneda E. Antiproliferative Activity of Natural Taiwaniaquinoids and Related Compounds. JOURNAL OF NATURAL PRODUCTS 2017; 80:308-318. [PMID: 28121430 DOI: 10.1021/acs.jnatprod.6b00700] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The in vitro antiproliferative activities of some taiwaniaquinoids and related compounds with functionalized A, B, or C rings against human breast (MCF-7), colon (T-84), and lung (A-549) tumor cell lines were assayed. The most potent compounds, 16, 27, and 36, were more effective than the naturally occurring taiwaniaquinones A (4) and F (5) in all three cell lines. The structure-activity relationship study of these new taiwaniaquinoids highlighted the correlation between the bromo substituent and the antiproliferative activity, especially in MCF-7 cells. These findings indicate that some of the taiwaniaquinoids might be useful as cytostatic agents against breast, colon, and lung cancer cell lines.
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Affiliation(s)
| | | | - Soumicha Mahdjour
- Laboratory Productions, Plant and Microbial Valuations (LP2VM), Department of Biotechnology, University of Sciences and Technology of Oran Mohamed Boudiaf , BP 1525, El M'Naouer, Oran, Algeria
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22
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Lypson AB, Wilcox CS. Synthesis and NMR Analysis of a Conformationally Controlled β-Turn Mimetic Torsion Balance. J Org Chem 2017; 82:898-909. [DOI: 10.1021/acs.joc.6b02307] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alyssa B. Lypson
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Craig S. Wilcox
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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23
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Kakde BN, Parida A, Kumar N, Mourya A, Bisai A. FeCl3-Catalyzed Highly Efficient Nazarov Type Cyclization of Arylvinylcarbinols: Total Synthesis of (±)-Dichroanal B and Related Taiwaniaquinoids†. ChemistrySelect 2016. [DOI: 10.1002/slct.201600890] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Badrinath N. Kakde
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhouri, Bhopal - 462066 Madhya Pradesh India
| | - Amarchand Parida
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhouri, Bhopal - 462066 Madhya Pradesh India
| | - Nivesh Kumar
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhouri, Bhopal - 462066 Madhya Pradesh India
| | - Abhishek Mourya
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhouri, Bhopal - 462066 Madhya Pradesh India
- Department of Chemistry; Indian Institute of Technology Roorkee; Roorkee - 247667, Uttrakhand India
| | - Alakesh Bisai
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhouri, Bhopal - 462066 Madhya Pradesh India
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24
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Kakde BN, Parida A, Kumari P, Bisai A. Total syntheses of (±)-taiwaniaquinol D and (±)-taiwaniaquinone D via a key Lewis acid-catalyzed Nazarov type cyclization. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Carmichael RA, Chalifoux WA. Multicomponent Double Diels–Alder/Nazarov Tandem Cyclization of Symmetric Cross‐Conjugated Diynones to Generate [6‐5‐6] Tricyclic Products. Chemistry 2016; 22:8781-5. [DOI: 10.1002/chem.201601850] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Rachael A. Carmichael
- Department of Chemistry University of Nevada, Reno 1664 N. Virginia St. Reno NV 89557 USA
| | - Wesley A. Chalifoux
- Department of Chemistry University of Nevada, Reno 1664 N. Virginia St. Reno NV 89557 USA
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26
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Shi Y, Gao S. Recent advances of synthesis of fluorenone and fluorene containing natural products. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.022] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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27
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Meng Y, Liu Y, Lv Z, Wang J, Wang Y, Song C, Chang J. Concise Synthesis of Taiwaniaquinol B and 5-epi-Taiwaniaquinone G. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The natural product taiwaniaquinol B and the unnatural 5- epi-taiwaniaquinone G were synthesized based on a highly efficient tandem acylation–Nazarov cyclization approach to build the tricyclic skeleton.
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Affiliation(s)
- Yonggang Meng
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, P. R. China
| | - Yizhen Liu
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, P. R. China
| | - Zhigang Lv
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, P. R. China
| | - Jinqian Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, P. R. China
| | - Yanyan Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, P. R. China
| | - Chuanjun Song
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, P. R. China
| | - Junbiao Chang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, P. R. China
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28
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Kakde BN, Kumari P, Bisai A. Total Synthesis of (±)-Taiwaniaquinol F and Related Taiwaniaquinoids. J Org Chem 2015; 80:9889-99. [DOI: 10.1021/acs.joc.5b01345] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Badrinath N. Kakde
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass
Road, Bhopal, Madhya Pradesh 462 066, India
| | - Pooja Kumari
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass
Road, Bhopal, Madhya Pradesh 462 066, India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass
Road, Bhopal, Madhya Pradesh 462 066, India
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29
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Dey T, Ghosh S, Ghosh S, Mukherjee AK. 5-Arylidene derivatives of Meldrum’s acid: Synthesis, structural characterization using single crystal and powder crystal X-ray diffraction, and electronic properties. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Karad SN, Chung WK, Liu RS. Gold-catalyzed formal [4π+2π]-cycloadditions of tert-butyl propiolates with aldehydes and ketones to form 4H-1,3-dioxine derivatives. Chem Commun (Camb) 2015; 51:13004-7. [DOI: 10.1039/c5cc04538j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel gold-catalyzed [4π+2π]-cycloadditions of tert-butyl propiolates with aldehydes and ketones have been developed to form 4H-1,3-dioxine derivatives.
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Affiliation(s)
| | - Wei-Kang Chung
- Department of Chemistry
- National Tsing Hua University101
- Hsinchu
- Taiwan
| | - Rai-Shung Liu
- Department of Chemistry
- National Tsing Hua University101
- Hsinchu
- Taiwan
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31
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Shockley S, Holder JC, Stoltz BM. A catalytic, enantioselective formal synthesis of (+)-dichroanone and (+)-taiwaniaquinone H. Org Lett 2014; 16:6362-5. [PMID: 25489925 PMCID: PMC4275150 DOI: 10.1021/ol5031537] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Indexed: 11/29/2022]
Abstract
A catalytic, enantioselective formal synthesis of (+)-dichroanone and (+)-taiwaniaquinone H is reported. The all-carbon quaternary stereocenter was constructed by asymmetric conjugate addition catalyzed by a palladium(II) (S)-tert-butylpyridinooxazoline complex. The unexpected formation of a [3.2.1] bicyclic intermediate required the identification of a new route. Analysis of the Hammett constants for para-substituted arenes enabled the rational design of a highly enantioselective conjugate addition substrate that led to the completion of the formal synthesis.
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Affiliation(s)
| | | | - Brian M. Stoltz
- The Warren and Katharine
Schlinger Laboratory for Chemistry and Chemical Engineering, Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 East California Boulevard, MC 101-20, Pasadena, California 91125, United States
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32
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Shen H, Fu J, Gong J, Yang Z. Tunable and Chemoselective Syntheses of Dihydroisobenzofurans and Indanones via Rhodium-Catalyzed Tandem Reactions of 2-Triazole-benzaldehydes and 2-Triazole-alkylaryl Ketones. Org Lett 2014; 16:5588-91. [DOI: 10.1021/ol502617m] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Hongjuan Shen
- Laboratory
of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Junkai Fu
- Laboratory
of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Jianxian Gong
- Laboratory
of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhen Yang
- Laboratory
of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry
of Education and Beijing National Laboratory for Molecular Science
(BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- Key
Laboratory of Marine Drugs, Chinese Ministry of Education, School
of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
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33
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Li LQ, Li MM, Chen D, Liu HM, Geng HC, Lin J, Qin HB. Catalytic asymmetric formal total synthesis of (+)-dichroanone and (+)-taiwaniaquinone H. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.08.110] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Wang J, Wang J, Li C, Meng Y, Wu J, Song C, Chang J. Synthesis of 5-epi-Taiwaniaquinone G. J Org Chem 2014; 79:6354-9. [DOI: 10.1021/jo500931e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Jinqian Wang
- College
of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jing Wang
- School
of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Changwei Li
- College
of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yonggang Meng
- College
of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jie Wu
- College
of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Chuanjun Song
- College
of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Junbiao Chang
- College
of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
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35
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Cai S, Xiao Z, Shi Y, Gao S. The Photo-Nazarov Reaction: Scope and Application. Chemistry 2014; 20:8677-81. [DOI: 10.1002/chem.201402993] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Indexed: 11/09/2022]
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36
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Yan X, Hu X. Protecting-Group-Free Synthesis of Taiwaniaquinone H Using a One-Pot Thermal Ring Expansion/4π-Electrocyclization Strategy. J Org Chem 2014; 79:5282-6. [DOI: 10.1021/jo5008652] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiuxiang Yan
- Department of Chemistry & Material Science, Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China, Northwest University, Xi’an 710069, People’s Republic of China
| | - Xiangdong Hu
- Department of Chemistry & Material Science, Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China, Northwest University, Xi’an 710069, People’s Republic of China
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37
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Wu X, Li ML, Chen DF, Chen SS. Enantioselective construction of [6,5,6]-carbocyclic systems by organo/metal-catalyzed sequential reactions. J Org Chem 2014; 79:4743-50. [PMID: 24742320 DOI: 10.1021/jo5006729] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient strategy for the enantioselective construction of [6,5,6]-carbocyclic compounds has been established via one-pot reaction of (E)-4-(2-ethynylphenyl)but-3-en-2-ones with maleimide sequentially catalyzed by cinchona alkaloid-based primary amine and gold complex (Ph3PAuNTf2). This methodology provided a facile approach to access the [6,5,6]-tricyclic skeleton in fairly good yield and with perfect enantioselectivities (98% to >99% ee).
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Affiliation(s)
- Xiang Wu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China , Hefei 230026, China
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38
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Bai G, Han J, Zhang H, Liu C, Lan X, Tian F, Zhao Z, Jin H. Friedel–Crafts acylation of anisole with octanoic acid over acid modified zeolites. RSC Adv 2014. [DOI: 10.1039/c4ra02278e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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39
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Abstract
The first, diastereoselective total syntheses of musellarins A–C were achieved concisely with 7.8–9.8% yields in 15–16 steps, featuring (i) Achmatowicz rearrangement, Kishi reduction, and Friedel–Crafts cyclization to construct the tricyclic framework and (ii) Heck coupling of aryldiazonium salts to introduce the aryl group into the dihydropyran in a 2,6-trans fashion.
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Affiliation(s)
- Zhilong Li
- Department of Chemistry
- The Hong Kong University of Science and Technology
- , China
| | - Tsz-Fai Leung
- Department of Chemistry
- The Hong Kong University of Science and Technology
- , China
| | - Rongbiao Tong
- Department of Chemistry
- The Hong Kong University of Science and Technology
- , China
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40
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Stereocontrolled synthesis and functionalization of cyclobutanes and cyclobutanones. Molecules 2013; 18:15541-72. [PMID: 24352013 PMCID: PMC6269998 DOI: 10.3390/molecules181215541] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 12/09/2013] [Accepted: 12/11/2013] [Indexed: 02/02/2023] Open
Abstract
In the last decade a certain number of new cyclobutane and cyclobutanone synthesis and functionalization protocols have been published. Organo- and biocatalyzed eco-friendly approaches to cyclobutane-containing molecules have been developed with interesting results. Also, successful new total synthesis of bioactive compounds and drugs have been recently reported where a four membered ring represented the key intermediate. Therefore, the rising interest in this field represents a great point of discussion for the scientific community, disclosing the synthetic potential of strained four membered ring carbocyclic compounds. Herein we report a critical survey on the literature concerning the enantiocontrolled synthesis and functionalization of cyclobutane derivatives, with particular attention to metal-free, low impact methodologies, published during the period 2000-2013.
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41
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Ozeki M, Satake M, Toizume T, Fukutome S, Arimitsu K, Hosoi S, Kajimoto T, Iwasaki H, Kojima N, Node M, Yamashita M. First asymmetric total synthesis of (+)-taiwaniaquinol D and (−)-taiwaniaquinone D by using intramolecular Heck reaction. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.051] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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42
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Deng J, Li R, Luo Y, Li J, Zhou S, Li Y, Hu J, Li A. Divergent Total Synthesis of Taiwaniaquinones A and F and Taiwaniaquinols B and D. Org Lett 2013; 15:2022-5. [DOI: 10.1021/ol400717h] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jun Deng
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ruofan Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Yijie Luo
- State Key Laboratory of Bioorganic and Natural Products Chemistry, 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, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Shupeng Zhou
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Yongjian Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jingyu Hu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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43
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Thommen C, Jana CK, Neuburger M, Gademann K. Syntheses of Taiwaniaquinone F and Taiwaniaquinol A via an Unusual Remote C–H Functionalization. Org Lett 2013; 15:1390-3. [DOI: 10.1021/ol4003652] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christophe Thommen
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Chandan Kumar Jana
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Markus Neuburger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Karl Gademann
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
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44
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Kakde BN, Bhunia S, Bisai A. Approach to the core structure of abeo-abietanes and gibberellins via Stork–Danheiser sequence followed by Friedel–Crafts alkylations. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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45
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Basavaiah D, Reddy BS, Lingam H. Baylis–Hillman acetates in carbocyclic synthesis: a convenient protocol for synthesis of densely substituted indenes. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.12.069] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Kakde BN, De S, Dey D, Bisai A. Metal triflate-catalyzed cyclization of arylvinylcarbinols: formal synthesis of (±)-dichroanone and (±)-taiwaniaquinone H. RSC Adv 2013. [DOI: 10.1039/c3ra41497c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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47
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Chavan SP, Garai S, Dutta AK, Pal S. Friedel-Crafts Acylation Reactions Using Esters. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201181] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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48
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Dhara D, Gayen KS, Khamarui S, Pandit P, Ghosh S, Maiti DK. CeCl3·7H2O Catalyzed C–C and C–N Bond-Forming Cascade Cyclization with Subsequent Side-Chain Functionalization and Rearrangement: A Domino Approach to Pentasubstituted Pyrrole Analogues. J Org Chem 2012; 77:10441-9. [DOI: 10.1021/jo301796r] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Dipankar Dhara
- Department
of Chemistry, University of Calcutta, University College of Science, 92, A. P. C.
Road, Kolkata-700009, India
| | - Krishnanka S. Gayen
- Department
of Chemistry, University of Calcutta, University College of Science, 92, A. P. C.
Road, Kolkata-700009, India
| | - Saikat Khamarui
- Department
of Chemistry, University of Calcutta, University College of Science, 92, A. P. C.
Road, Kolkata-700009, India
| | - Palash Pandit
- Department
of Chemistry, University of Calcutta, University College of Science, 92, A. P. C.
Road, Kolkata-700009, India
| | - Sukla Ghosh
- Department
of Chemistry, University of Calcutta, University College of Science, 92, A. P. C.
Road, Kolkata-700009, India
| | - Dilip K. Maiti
- Department
of Chemistry, University of Calcutta, University College of Science, 92, A. P. C.
Road, Kolkata-700009, India
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Wu N, Messinis A, Batsanov AS, Yang Z, Whiting A, Marder TB. Palladium(ii)-catalysed tandem cyclisation of electron-deficient aromatic enynes. Chem Commun (Camb) 2012; 48:9986-8. [DOI: 10.1039/c2cc35114e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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50
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Tapia R, Guardia JJ, Alvarez E, Haidöur A, Ramos JM, Alvarez-Manzaneda R, Chahboun R, Alvarez-Manzaneda E. General Access to Taiwaniaquinoids Based on a Hypothetical Abietane C7–C8 Cleavage Biogenetic Pathway. J Org Chem 2011; 77:573-84. [DOI: 10.1021/jo202163y] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rubén Tapia
- Departamento de Quimica Orgánica,
Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Juan J. Guardia
- Departamento de Quimica Orgánica,
Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Esteban Alvarez
- Departamento de Quimica Orgánica,
Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Ali Haidöur
- Departamento de Quimica Orgánica,
Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Jose M. Ramos
- Departamento de Quimica Orgánica,
Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Ramón Alvarez-Manzaneda
- Departamento de Química
Orgánica, Facultad de Ciencias Experimentales, Universidad de Almería, La Cañada de
San Urbano, 04120 Almería, Spain
| | - Rachid Chahboun
- Departamento de Quimica Orgánica,
Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Enrique Alvarez-Manzaneda
- Departamento de Quimica Orgánica,
Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
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