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Lu SC, Liang YY, Li L, Wang XL, Zhang SP, Gong YL, Xu S. Synthesis of the Tricyclic Caged Core of Palhinine Alkaloids Based on a Non-Diels-Alder-Type Strategy. Org Lett 2019; 21:5567-5569. [PMID: 31241967 DOI: 10.1021/acs.orglett.9b01898] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise synthesis of the tricyclo[4.3.1.03,7]decane caged core of palhinine alkaloids was developed with SmI2-mediated cyclization and light-initiated radical addition-fragmentation as key steps. Compared with the reported racemic routes which are all based on Diels-Alder-type key reactions, our strategy would be more readily accessible to the asymmetric total syntheses of the palhinine alkaloids.
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Affiliation(s)
- Shi-Chao Lu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Yu-Yan Liang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Liang Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Xiao-Lei Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Shi-Peng Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Ya-Ling Gong
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Shu Xu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
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Li L, Liu Z, Tang S, Li J, Ren X, Yang G, Li H, Yuan B. Amphiphilic ligands for Cu-catalyzed aerobic oxidation to synthesize 9-fluorenones in water. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.04.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Cheallaigh AN, Mansell DJ, Toogood HS, Tait S, Lygidakis A, Scrutton NS, Gardiner JM. Chemoenzymatic Synthesis of the Intermediates in the Peppermint Monoterpenoid Biosynthetic Pathway. JOURNAL OF NATURAL PRODUCTS 2018; 81:1546-1552. [PMID: 29979593 DOI: 10.1021/acs.jnatprod.7b01026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A chemoenzymatic approach providing access to all four intermediates in the peppermint biosynthetic pathway between limonene and menthone/isomenthone, including noncommercially available intermediates (-)- trans-isopiperitenol (2), (-)-isopiperitenone (3), and (+)- cis-isopulegone (4), is described. Oxidation of (+)-isopulegol (13) followed by enolate selenation and oxidative elimination steps provides (-)-isopiperitenone (3). A chemical reduction and separation route from (3) provides both native (-)- trans-isopiperitenol (2) and isomer (-)- cis-isopiperitenol (18), while enzymatic conjugate reduction of (-)-isopiperitenone (3) with IPR [(-)-isopiperitenone reductase)] provides (+)- cis-isopulegone (4). This undergoes facile base-mediated chemical epimerization to (+)-pulegone (5), which is subsequently shown to be a substrate for NtDBR ( Nicotiana tabacum double-bond reductase) to afford (-)-menthone (7) and (+)-isomenthone (8).
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Affiliation(s)
- Aisling Ní Cheallaigh
- BBSRC/EPSRC Manchester Synthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and School of Chemistry , The University of Manchester , 131 Princess Street , Manchester M1 7DN , U.K
| | - David J Mansell
- BBSRC/EPSRC Manchester Synthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and School of Chemistry , The University of Manchester , 131 Princess Street , Manchester M1 7DN , U.K
| | - Helen S Toogood
- BBSRC/EPSRC Manchester Synthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and School of Chemistry , The University of Manchester , 131 Princess Street , Manchester M1 7DN , U.K
| | - Shirley Tait
- BBSRC/EPSRC Manchester Synthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and School of Chemistry , The University of Manchester , 131 Princess Street , Manchester M1 7DN , U.K
| | - Antonios Lygidakis
- BBSRC/EPSRC Manchester Synthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and School of Chemistry , The University of Manchester , 131 Princess Street , Manchester M1 7DN , U.K
| | - Nigel S Scrutton
- BBSRC/EPSRC Manchester Synthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and School of Chemistry , The University of Manchester , 131 Princess Street , Manchester M1 7DN , U.K
| | - John M Gardiner
- BBSRC/EPSRC Manchester Synthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and School of Chemistry , The University of Manchester , 131 Princess Street , Manchester M1 7DN , U.K
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