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Characterization reveals a putative Epoxide hydrolase from Yarrowia lipolytica with the ability to convert rac-1,2-epoxyhexane to (R)-diol. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.12.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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2
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Pérez-Palau M, Balaguer-Garcia E, Romea P, Urpí F. Optimized Asymmetric Synthesis of Umuravumbolide. ACS OMEGA 2022; 7:30835-30840. [PMID: 36092614 PMCID: PMC9453790 DOI: 10.1021/acsomega.2c02304] [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: 04/13/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
Herein, the asymmetric synthesis of umuravumbolide (1) is described. The new approach features highly stereoselective transformations (dr ≥ 95:5) to install both stereocenters and the Z olefin, which involve a new radical alkylation, an Ando olefination, and a Krische allylation on a Z allylic alcohol, not reported before. The application of such successful reactions, together with the limited use of protecting groups and concession steps, makes it possible to complete the synthesis in 10 steps, resulting in a 39% overall yield from chiral N-acyl oxazolidinone 2.
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Hu D, Hu BC, Hou XD, Zhang D, Lei YQ, Rao YJ, Wu MC. Structure-Guided Regulation in the Enantioselectivity of an Epoxide Hydrolase to Produce Enantiomeric Monosubstituted Epoxides and Vicinal Diols via Kinetic Resolution. Org Lett 2022; 24:1757-1761. [PMID: 35229602 DOI: 10.1021/acs.orglett.1c04348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Structure-guided microtuning of an Aspergillus usamii epoxide hydrolase was executed. One mutant, A214C/A250I, displayed a 12.6-fold enhanced enantiomeric ratio (E = 202) toward rac-styrene oxide, achieving its nearly perfect kinetic resolution at 0.8 M in pure water or 1.6 M in n-hexanol/water. Several other beneficial mutants also displayed significantly improved E values, offering promising biocatalysts to access 19 structurally diverse chiral monosubstituted epoxides (97.1 - ≥ 99% ees) and vicinal diols (56.2-98.0% eep) with high yields.
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Affiliation(s)
- Die Hu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, P.R. China.,National-local Joint Engineering Research Center of Biomass Refining and High Quality Utilization, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P.R. China
| | - Bo-Chun Hu
- Food and Pharmacy College, Xuchang University, Xuchang 46100, P.R. China
| | - Xiao-Dong Hou
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
| | - Dong Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
| | - Yu-Qing Lei
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
| | - Yi-Jian Rao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
| | - Min-Chen Wu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, P.R. China
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Liu YY, Wu MD, Zhu XX, Zhang XD, Zhang C, Xu YH, Wu MC. Remarkable improvement in the regiocomplementarity of a Glycine max epoxide hydrolase by reshaping its substrate-binding pocket for the enantioconvergent preparation of (R)-hexane-1,2-diol. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Rattray RD, Van Wyk BE. The Botanical, Chemical and Ethnobotanical Diversity of Southern African Lamiaceae. Molecules 2021; 26:molecules26123712. [PMID: 34207006 PMCID: PMC8233991 DOI: 10.3390/molecules26123712] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/11/2021] [Accepted: 06/11/2021] [Indexed: 11/24/2022] Open
Abstract
The Lamiaceae is undoubtedly an important plant family, having a rich history of use that spans the globe with many species being used in folk medicine and modern industries alike. Their ability to produce aromatic volatile oils has made them valuable sources of materials in the cosmetic, culinary, and pharmaceutical industries. A thorough account of the taxonomic diversity, chemistry and ethnobotany is lacking for southern African Lamiaceae, which feature some of the region’s most notable medicinal and edible plant species. We provide a comprehensive insight into the Lamiaceae flora of southern Africa, comprising 297 species in 42 genera, 105 of which are endemic to the subcontinent. We further explore the medicinal and traditional uses, where all genera with documented uses are covered for the region. A broad review of the chemistry of southern African Lamiaceae is presented, noting that only 101 species (34%) have been investigated chemically (either their volatile oils or phytochemical characterization of secondary metabolites), thus presenting many and varied opportunities for further studies. The main aim of our study was therefore to present an up-to-date account of the botany, chemistry and traditional uses of the family in southern Africa, and to identify obvious knowledge gaps.
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Li C, Hu BC, Wen Z, Hu D, Liu YY, Chu Q, Wu MC. Greatly enhancing the enantioselectivity of PvEH2, a Phaseolus vulgaris epoxide hydrolase, towards racemic 1,2-epoxyhexane via replacing its partial cap-loop. Int J Biol Macromol 2020; 156:225-232. [PMID: 32294502 DOI: 10.1016/j.ijbiomac.2020.04.071] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 04/08/2020] [Accepted: 04/09/2020] [Indexed: 11/30/2022]
Abstract
To achieve the kinetic resolution and enantioconvergent hydrolysis of rac-1,2-epoxyhexane, the E value of PvEH2 was enhanced by substituting its partial cap-loop. Based on the experimental results reported previously and computer-aided analysis, the flexible and variable cap-loop, especially its middle segment, was speculated to be related to the catalytic properties of PvEH2. In view of this, four PvEH2's hybrids, Pv2St, Pv2Pv1, Pv2Vr1 and Pv2Vr2, were designed by substituting the middle segment (190EGMGSNLNTSMP201) of a cap-loop in PvEH2 with the corresponding ones in StEH, PvEH1, VrEH1 and VrEH2, respectively. Then, the hybrid-encoding genes, pv2st, pv2pv1, pv2vr1 and pv2vr2, were constructed by fusion PCR, and expressed in E. coli Rosetta(DE3). The expressed hybrid, Pv2St, displayed the highest specific activity of 35.3 U/mg protein towards rac-1,2-epoxyhexane. The corresponding transformant, E. coli/pv2st, exhibited the largest E value of 24.2, which was 11.5-fold that of E. coli/pveh2 expressing PvEH2. The scale-up kinetic resolution of 280 mM rac-1,2-epoxyhexane was carried out using 40 mg dry cells/mL of E. coli/pv2st at 25 °C for 4.5 h, retaining (S)-1,2-epoxyhexane with >99.5% ees and 36.9% yield. Additionally, the chemo-enzymatic enantioconvergent hydrolysis of rac-1,2-epoxyhexane using E. coli/pv2st followed by sulfuric acid produced (R)-hexane-1,2-diol with 73.0% eep and 86.5% yield.
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Affiliation(s)
- Chuang Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Bo-Chun Hu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Zheng Wen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Die Hu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, PR China
| | - You-Yi Liu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, PR China
| | - Qing Chu
- Joint Management Office, Shanghai Medical Association, Shanghai 200040, PR China.
| | - Min-Chen Wu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, PR China.
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Ma KQ, Ren HB, Chao JB, Qin XM. Formal enantioselective total synthesis of bisdehydroneostemoninine. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2020; 22:655-662. [PMID: 31046457 DOI: 10.1080/10286020.2019.1608956] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 04/14/2019] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
A formal enantioselective total synthesis of bisdehydroneostemoninine employing L-glutamic acid as the chiral pool is described. The key features of the synthesis include regioselective and enantioselective opening the chiral epoxide with dimethylsulfonium methylide and tandem Friedel-Crafts cyclization followed by lactonization to form the 5-7-5 tricyclic core of the target stemona alkaloids. The synthetic route provides opportunities to explore the biological behavior of enantiopure bisdehydroneostemoninine. [Formula: see text].
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Affiliation(s)
- Kai-Qing Ma
- Modern Research Center for Traditional Chinese Medicine, Shanxi University, Taiyuan 030006, China
| | - Hu-Bin Ren
- Modern Research Center for Traditional Chinese Medicine, Shanxi University, Taiyuan 030006, China
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Jian-Bin Chao
- Scientific Instrument Center, Shanxi University, Taiyuan 030006, China
| | - Xue-Mei Qin
- Modern Research Center for Traditional Chinese Medicine, Shanxi University, Taiyuan 030006, China
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Hu B, Hu D, Zhang D, Wen Z, Zang J, Wu M. Manipulating the regioselectivity of a Solanum lycopersicum epoxide hydrolase for the enantioconvergent synthesis of enantiopure alkane- and alkene-1,2-diols. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00990c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This work engineered a superior double-site mutant SlEH1W106T/F189L used for the enantioconvergent biosynthesis of (R)-1b–6b with high eep values.
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Affiliation(s)
- Bochun Hu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122
| | - Die Hu
- Wuxi School of Medicine
- Jiangnan University
- Wuxi 214122
- China
| | - Dong Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122
| | - Zheng Wen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122
| | - Jia Zang
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University
- Wuxi 214002
- China
| | - Minchen Wu
- Wuxi School of Medicine
- Jiangnan University
- Wuxi 214122
- China
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Liu J, Wang L, Zhang J, Xu Z, Ye T. The total synthesis and stereochemical assignment of scytonemin A. Chem Commun (Camb) 2016; 52:1002-5. [PMID: 26593048 DOI: 10.1039/c5cc08324a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The total synthesis of scytonemin A and its C-9 epimer, as well as elucidation of the absolute stereochemistry of natural scytonemin A is described.
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Affiliation(s)
- Junyang Liu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China. and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Lei Wang
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China.
| | - Juefei Zhang
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China.
| | - Zhengshuang Xu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China.
| | - Tao Ye
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China. and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2013. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.09.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Rajendra Prasad K, Purushotham Reddy S, Suresh Babu K, Madhusudana Rao J. First Stereoselective Synthesis of the Cytotoxic Polyketide (4 R)-1-(3,5-Dihydroxyphenyl)-4-hydroxypentan-2-one. Helv Chim Acta 2015. [DOI: 10.1002/hlca.201400158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Tomioka T, Sankranti R, James AM, Mattern DL. Regioselective ring-opening α-methylenation of aryl epoxides to conjugated allyl alcohols utilizing n-BuLi and Me2SCH2 reagents. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.076] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Rajendra Prasad K, Venkanna A, Babu KS, Prasad A, Rao JM. Stereoselective synthesis of revised structure of stagonolide G. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2013.11.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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