1
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G.-Simonian N, Spieß P, Riomet M, Maryasin B, Klose I, Beaton Garcia A, Pollesböck L, Kaldre D, Todorovic U, Minghua Liu J, Kaiser D, González L, Maulide N. Stereodivergent Synthesis of 1,4-Dicarbonyl Compounds through Sulfonium Rearrangement: Mechanistic Investigation, Stereocontrolled Access to γ-Lactones and γ-Lactams, and Total Synthesis of Paraconic Acids. J Am Chem Soc 2024; 146:13914-13923. [PMID: 38741029 PMCID: PMC11117187 DOI: 10.1021/jacs.4c01755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 05/16/2024]
Abstract
Although simple γ-lactones and γ-lactams have received considerable attention from the synthetic community, particularly due to their relevance in biological and medicinal contexts, stereoselective synthetic approaches to more densely substituted derivatives remain scarce. The in-depth study presented herein, showcasing a straightforward method for the stereocontrolled synthesis of γ-lactones and γ-lactams, builds on and considerably expands the stereodivergent synthesis of 1,4-dicarbonyl compounds by a ynamide/vinyl sulfoxide coupling. A full mechanistic and computational study of the rearrangement was conducted, uncovering the role of all of the reaction components and providing a rationale for stereoselection. The broad applicability of the developed tools to streamlining synthesis is demonstrated by concise enantioselective total syntheses of (+)-nephrosteranic acid, (+)-rocellaric acid, and (+)-nephromopsinic acid.
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Affiliation(s)
- Nicolas G.-Simonian
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Philipp Spieß
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Margaux Riomet
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Boris Maryasin
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
- Institute
of Theoretical Chemistry, University of
Vienna, Währinger
Straße 17, 1090 Vienna, Austria
| | - Immo Klose
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Alexander Beaton Garcia
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Laurin Pollesböck
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Dainis Kaldre
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Uroš Todorovic
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Julia Minghua Liu
- Institute
of Theoretical Chemistry, University of
Vienna, Währinger
Straße 17, 1090 Vienna, Austria
| | - Daniel Kaiser
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Leticia González
- Institute
of Theoretical Chemistry, University of
Vienna, Währinger
Straße 17, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute
of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
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2
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Kawamoto Y, Karube F, Kobayashi T, Ito H. Stereocontrolled asymmetric synthesis of mollebenzylanols A and B using Claisen rearrangements. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Gangani AJ, Kumar P, Fernandes RA. Concise Stereoselective Synthesis of β-Hydroxy-γ-lactones: (4 R,5 R)-4-Hydroxy-γ-decalactone from the Japanese Orange Fly and Enantiomers of Arachnid Harvestmen Isolates. JOURNAL OF NATURAL PRODUCTS 2021; 84:120-125. [PMID: 33390009 DOI: 10.1021/acs.jnatprod.0c01207] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The naturally occurring (4R,5R)-4-hydroxy-γ-decalactone from the Japanese orange fly and the antipode of (4S,5R)-4-hydroxy-γ-dodecalactone from the harvestmen arachnid and their stereoisomers are synthesized from the chiral pool material d-glucono-δ-lactone in a few steps. The one-pot conversion of the latter to γ-vinyl-β-hydroxy-γ-lactone, cross-metathesis with requisite olefin, and hydrogenation enabled the synthesis of syn-lactones in just a two-pot operation. An additional efficient Pd-catalyzed allylic isomerization of γ-vinyl-β-hydroxy-γ-lactone led to the anti-lactones in high yields.
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Affiliation(s)
- Ashvin J Gangani
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076 Maharashtra, India
| | - Praveen Kumar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076 Maharashtra, India
| | - Rodney A Fernandes
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076 Maharashtra, India
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4
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Kawamoto Y, Karube F, Kobayashi T, Ito H. Enantioselective Total Synthesis of Mollebenzylanol A. Org Lett 2020; 22:7609-7612. [PMID: 32924500 DOI: 10.1021/acs.orglett.0c02811] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Mollebenzylanol A is a tyrosine phosphatase 1B inhibitor isolated from the leaves of Rhododendron molle in 2018 that has a highly functionalized structure. The first enantioselective total synthesis of mollebenzylanol A was achieved in 13 steps from a known chiral starting material. An efficient and practical synthetic scheme was disclosed in a stereocontrolled manner, including stereo/regioselective epoxidation, Eschenmoser-Claisen rearrangement, and stereocontrolled dihydroxylation.
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Affiliation(s)
- Yuichiro Kawamoto
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Fuka Karube
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Toyoharu Kobayashi
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Hisanaka Ito
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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5
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Fernandes RA, Chaudhari DA, Jha AK. Evolution of Strategies in Paraconic Acids Synthesis. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000353] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry Indian Institute of Technology Bombay Powai, Mumbai 400076 Maharashtra India
| | - Dipali A. Chaudhari
- Department of Chemistry Indian Institute of Technology Bombay Powai, Mumbai 400076 Maharashtra India
| | - Amit K. Jha
- Department of Chemistry Indian Institute of Technology Bombay Powai, Mumbai 400076 Maharashtra India
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6
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Yuan C, Shu XC, Fan L, Zhang YB, Guan LL, Yu FL, Chen XL, Li G. New paraconic acids from the endophytic fungus Xylariaceae sp. J4. Nat Prod Res 2020; 36:130-135. [PMID: 32441138 DOI: 10.1080/14786419.2020.1768088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Three new paraconic acids, xylariacinics A-C (1-3), were isolated from the endophyte Xylariaceae sp. J4 harbored in the medicinal plant Blumea balsamifera. Their structures were elucidated on the basis of extensive spectroscopic data including HRMS, and NMR. The antibacterial efficacies of compounds 1-3 were evaluated against a panel of bacteria such as Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa. Their antifungal activities were also tested against Colletotrichum gloeosporioides. Unfortunately, all of them were inactive.
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Affiliation(s)
- Chao Yuan
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Hainan Provincial Engineering Research Center for Tropical Medicinal Plants, Danzhou, People's Republic of China
| | - Xue-Chun Shu
- College of Forestry, Hainan University, Haikou, People's Republic of China
| | - Lin Fan
- Department of Biology and Chemistry Engineering, Weihai Vocational College, Weihai, People's Republic of China
| | - Ying-Bo Zhang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Hainan Provincial Engineering Research Center for Tropical Medicinal Plants, Danzhou, People's Republic of China
| | - Ling-Liang Guan
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Hainan Provincial Engineering Research Center for Tropical Medicinal Plants, Danzhou, People's Republic of China
| | - Fu-Lai Yu
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Hainan Provincial Engineering Research Center for Tropical Medicinal Plants, Danzhou, People's Republic of China
| | - Xiao-Lu Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Hainan Provincial Engineering Research Center for Tropical Medicinal Plants, Danzhou, People's Republic of China
| | - Gang Li
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People's Republic of China
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7
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Nallasivam JL, Fernandes RA. A protecting-group-free synthesis of (+)-nephrosteranic, (+)-protolichesterinic, (+)-nephrosterinic, (+)-phaseolinic, (+)-rocellaric acids and (+)-methylenolactocin. Org Biomol Chem 2017; 15:708-716. [DOI: 10.1039/c6ob02398c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A collective synthesis of a γ-butyrolactone class of paraconic acids such as (+)-methylenolactocin, (+)-phaseolinic acid, (+)-nephrosteranic acid, (+)-nephrosterinic acid, (+)-rocellaric acid and (+)-protolichesterinic acid is described.
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Affiliation(s)
- Jothi L. Nallasivam
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Rodney A. Fernandes
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
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8
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Design, synthesis and biological evaluation of potential antibacterial butyrolactones. Bioorg Med Chem 2016; 24:5823-5833. [DOI: 10.1016/j.bmc.2016.09.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 09/14/2016] [Accepted: 09/15/2016] [Indexed: 11/30/2022]
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9
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Ghochikyan TV, Samvelyan MA, Harutyunyan VS, Harutyunyan EV, Petrosyan A, Langer P. Synthesis of aminomethyl derivatives of 5-substituted-3-(prop-2-ynyl)dihydrofuran-2(3 H)-ones. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2016. [DOI: 10.1515/znb-2015-0144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
An easy approach for the synthesis of various 5-substituted-3-(prop-2-ynyl)dihydrofuran-2(3H)-ones is described. As a method of choice, Mannich aminomethylation of terminal alkynes is adopted. The reaction works well with acyclic and cyclic secondary amines and provides the desired products, with good to very good yields.
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Affiliation(s)
| | - Melanya A. Samvelyan
- Faculty of Pharmacology and Chemistry, Yerevan State University, Alex Manoogian 1, 0025 Yerevan, Armenia
| | - Vilik S. Harutyunyan
- Faculty of Pharmacology and Chemistry, Yerevan State University, Alex Manoogian 1, 0025 Yerevan, Armenia
| | - Edgar V. Harutyunyan
- Faculty of Pharmacology and Chemistry, Yerevan State University, Alex Manoogian 1, 0025 Yerevan, Armenia
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10
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Enantioselective synthesis of 4-alkenoic acids via Pd-catalyzed allylic alkylation: stereocontrolled construction of γ and δ-lactones. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.06.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Wang H, Tang P, Zhou Q, Zhang D, Chen Z, Huang H, Qin Y. One-Pot Synthesis of Multisubstituted Butyrolactonimidates: Total Synthesis of (−)-Nephrosteranic Acid. J Org Chem 2015; 80:2494-502. [PMID: 25671631 DOI: 10.1021/jo5029166] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Huijing Wang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Pei Tang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Qilong Zhou
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Dan Zhang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Zhitao Chen
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Hongxiu Huang
- Key
Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry
of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Yong Qin
- Key
Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry
of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
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12
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Patil PH, Fernandes RA. A stereoselective synthesis of the reported structure of polyporolide. RSC Adv 2015. [DOI: 10.1039/c5ra07930f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A concise stereoselective synthesis of the reported structure of newly isolated acetogenin polyporolide is presented indicating a need for structure revision of the natural product.
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Affiliation(s)
- Pradnya H. Patil
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Rodney A. Fernandes
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
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13
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Chaudhari DA, Kattanguru P, Fernandes RA. A concise protecting-group-free synthesis of cephalosporolides E and F. RSC Adv 2015. [DOI: 10.1039/c5ra06991b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
A concise protecting-group-free synthesis of cephalosporolides E and F has been accomplished from l-mannonic-γ-lactone by one-pot conversion to γ-vinyl-β-hydroxy-γ-lactone, cross-metathesis and Wacker-type oxidative spiroketalization.
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Affiliation(s)
- Dipali A. Chaudhari
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Pullaiah Kattanguru
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Rodney A. Fernandes
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
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14
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Halle MB, Fernandes RA. A relay ring-opening/double ring-closing metathesis strategy for the bicyclic macrolide-butenolide core structures. RSC Adv 2014. [DOI: 10.1039/c4ra10937f] [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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15
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Huang SZ, Zhang X, Ma QY, Peng H, Zheng YT, Hu JM, Dai HF, Zhou J, Zhao YX. Anti-HIV-1 tigliane diterpenoids from Excoecaria acertiflia Didr. Fitoterapia 2014; 95:34-41. [PMID: 24613801 DOI: 10.1016/j.fitote.2014.02.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 02/21/2014] [Accepted: 02/25/2014] [Indexed: 10/25/2022]
Abstract
Three tigliane-type diterpenoids named excoecafolins A-C and two daphnane-type diterpenoids named excoecafolins D and E, together with 13 known compounds, were isolated from the EtOAc extract of Excoecaria acerifolia Didr. Their structures were elucidated through the analysis of the spectroscopic data. The anti-HIV-1 activity evaluation of five of these compounds showed that four possessed moderate anti-HIV-1 activities with EC50 0.258, 0.036, 0.046, and 0.978 μM, SI >1,836.9, 431.1, 298.7, and >503.7, respectively. Additionally, the chemotaxonomic issue of the affinity correlation between Thymelaeceae and Euphorbiaceae is discussed based on the isolates.
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Affiliation(s)
- Sheng-Zhuo Huang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, PR China
| | - Xuan Zhang
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650204, PR China
| | - Qing-Yun Ma
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China
| | - Hua Peng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, PR China
| | - Yong-Tang Zheng
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650204, PR China
| | - Jiang-Miao Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, PR China
| | - Hao-Fu Dai
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China
| | - Jun Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, PR China.
| | - You-Xing Zhao
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China.
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16
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Fernandes RA, Patil PH, Chowdhury AK. Ring-Closing Metathesis Enabled Efficient Synthesis ofγ-Butenolide Antifungal Agent (−)-Incrustoporin and its Analogues. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300216] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Fernandes RA, Patil PH, Chowdhury AK. Late-Stage β-Epimerization. A Stereodivergent to Stereoconvergent Relay to the First Total Synthesis of (+)-Murolic Acid. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301287] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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The Orthoester Johnson-Claisen Rearrangement in the Synthesis of Bioactive Molecules, Natural Products, and Synthetic Intermediates - Recent Advances. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301033] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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19
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Fernandes RA, Chowdhury AK. A Synthesis of (-)-(R)- and (+)-(S)-Lavandulol, (+)-Lavandulyl 2-Methylbutanoate, and (+)-Lavandulyl Senecioate through Orthoester Johnson-Claisen Rearrangement. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300520] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Botubol JM, Macías-Sánchez AJ, Collado IG, Hernández-Galán R. Stereoselective Synthesis and Absolute Configuration Determination of Xylariolide A. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201526] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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21
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Fournier J, Lozano O, Menozzi C, Arseniyadis S, Cossy J. Palladium-Catalyzed Asymmetric Allylic Alkylation of Cyclic Dienol Carbonates: Efficient Route to Enantioenriched γ-Butenolides Bearing an All-Carbon α-Quaternary Stereogenic Center. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206368] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Fournier J, Lozano O, Menozzi C, Arseniyadis S, Cossy J. Palladium-Catalyzed Asymmetric Allylic Alkylation of Cyclic Dienol Carbonates: Efficient Route to Enantioenriched γ-Butenolides Bearing an All-Carbon α-Quaternary Stereogenic Center. Angew Chem Int Ed Engl 2012; 52:1257-61. [DOI: 10.1002/anie.201206368] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Indexed: 11/08/2022]
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23
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Fernandes RA, Kattanguru P. Step-Economic and Protecting-Group-Free Total Synthesis of (+)-Cardiobutanolide. ASIAN J ORG CHEM 2012. [DOI: 10.1002/ajoc.201200130] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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24
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25
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Fernandes RA, Halle MB, Chowdhury AK, Ingle AB. Diastereoselective synthesis of (+)-nephrosterinic acid and (+)-protolichesterinic acid. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2011.12.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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26
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Fernandes RA, Ingle AB, Chaudhari DA. Control of Diastereoselectivity in Orthoester Johnson-Claisen Rearrangement of Tartrate-Based Allyl Alcohol: An Efficient Synthesis of Arundic Acid, a Potential Therapeutic Agent for Alzheimer's Disease. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101420] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Peed J, Davies IR, Peacock LR, Taylor JE, Kociok-Köhn G, Bull SD. Dihydroxylation-Based Approach for the Asymmetric Syntheses of Hydroxy-γ-butyrolactones. J Org Chem 2011; 77:543-55. [PMID: 22077239 DOI: 10.1021/jo2021289] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jennifer Peed
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
| | - Iwan R. Davies
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
| | - Lucy R. Peacock
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
| | - James E. Taylor
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
| | - Gabriele Kociok-Köhn
- Department
of Chemical Crystallography, University of Bath, Claverton Down, Bath, BA2 7AY,
United Kingdom
| | - Steven D. Bull
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
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28
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Total synthesis of (8S,11R,12R)- and (8R,11R,12R)-topsentolide B2 diastereomers and assignment of the absolute configuration. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.10.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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A concise synthesis of paraconic acids: (−)-methylenolactocin and (−)-phaseolinic acid. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.05.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fernandes RA, Chavan VP, Mulay SV. A concise and improved synthesis of (+)-eleutherin, (+)-allo-eleutherin and a formal synthesis of (+)-nocardione B. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.02.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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