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Kitajima M. Recent studies on chemical constituents of Ophiorrhiza plants. J Nat Med 2022; 76:748-755. [PMID: 35902551 PMCID: PMC9411090 DOI: 10.1007/s11418-022-01640-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 07/09/2022] [Indexed: 11/29/2022]
Abstract
Ophiorrhiza plants (Family Rubiaceae) are known to produce diverse monoterpenoid indole alkaloids including camptothecin with potent antitumor activity. This review contains a summary of recent chemical studies reported over the past 10 years regarding alkaloids (monoterpenoid indole and tetrahydroisoquinoline alkaloids, and cyclopeptide) in Ophiorrhiza plants. In addition, the alkaloid biosynthetic pathways based on their reported structures were proposed.
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Affiliation(s)
- Mariko Kitajima
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan.
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Wang Y, Joullié MM. Approaches to Cyclophane-Types of Cyclopeptide Alkaloids. CHEM REC 2021; 21:906-923. [PMID: 33656243 DOI: 10.1002/tcr.202100017] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/15/2021] [Indexed: 11/09/2022]
Abstract
The cyclopeptide alkaloids are cyclic depsipeptides incorporating cyclophanes with polyamide units 13-, 14- and 15-membered macrocyclic systems. Although various pharmacological activities have been ascribed to cyclopeptide alkaloids from plants of the Rhamnacea family, these studies have been hampered by their low availability due to the lack of reasonable amounts distributed in nature. Therefore, novel and efficient synthetic approaches should be an important aim, which inspired us to examine how to diversely construct the unique structures of this type of natural products. In this account, several typical strategies are presented in terms of efficient, stereocontrolled and regioselective synthesis of cyclopeptide alkaloids.
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Affiliation(s)
- Yuanhao Wang
- Department of Chemistry, University of Pennsylvania, 231 S. 34th St., Philadelphia, PA 19104, USA
| | - Madeleine M Joullié
- Department of Chemistry, University of Pennsylvania, 231 S. 34th St., Philadelphia, PA 19104, USA
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Kitajima M, Onozawa T, Kogure N, Takayama H. Elucidation of Absolute Configuration of Ophiorrhiside A by Comparison of ECD Spectra with That of Model Chiral Compound Having a 1,2,3,4-Tetrahydro-β-carbolin-3-one Skeleton. HETEROCYCLES 2021. [DOI: 10.3987/com-20-14351] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Nazari A, Heravi MM, Zadsirjan V. Oxazolidinones as chiral auxiliaries in asymmetric aldol reaction applied to natural products total synthesis. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2020.121629] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Tang J, Chen L, Zhang L, Ni G, Yu J, Wang H, Zhang F, Yuan S, Feng M, Chen S. Structure-guided evolution of a ketoreductase for efficient and stereoselective bioreduction of bulky α-amino β-keto esters. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01032h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Chiral vicinal amino alcohols were generated with excellent stereoselectivity and high conversion from bulky α-amino β-keto esters by an engineered ketoreductase called M30.
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Affiliation(s)
- Jiawei Tang
- Department of Biological Medicines & Shanghai Engineering Research Center of Immunotherapeutics, Fudan University School of Pharmacy, Shanghai 201203, P. R. China
| | - Liuqing Chen
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
| | - Luwen Zhang
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong, Shanghai 201203, P. R. China
| | - Guowei Ni
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong, Shanghai 201203, P. R. China
| | - Jun Yu
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong, Shanghai 201203, P. R. China
| | - Hongyi Wang
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong, Shanghai 201203, P. R. China
| | - Fuli Zhang
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong, Shanghai 201203, P. R. China
| | - Shuguang Yuan
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
| | - Meiqing Feng
- Department of Biological Medicines & Shanghai Engineering Research Center of Immunotherapeutics, Fudan University School of Pharmacy, Shanghai 201203, P. R. China
| | - Shaoxin Chen
- Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Pudong, Shanghai 201203, P. R. China
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Kaur A, Pannu A, Brar DS, Mehta SK, Salunke DB. Yb(OTf) 3-Catalyzed and Di- tert-butyl Dicarbonate-Mediated Decarboxylative Etherification and Esterification Reactions. ACS OMEGA 2020; 5:21007-21014. [PMID: 32875237 PMCID: PMC7450632 DOI: 10.1021/acsomega.0c02516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 07/31/2020] [Indexed: 06/11/2023]
Abstract
Protecting group chemistry has invariably captured the fascination of chemists because of its extensive viability in chemical synthesis. The present report describes our pioneer work of applying ytterbium triflate as a catalyst, for the reaction of alcohols with di-tert-butyl dicarbonate (Boc2O) leading to the formation of tert-butyl ethers. There exists no recorded evidence for the use of Yb(OTf)3 as a catalyst for the protection of alcohols to tert-butyl ethers, despite its excellent utility in various reactions. Yb(OTf)3 has been used predominantly in the catalytic deprotection studies such as selective deprotection of tert-butyl esters to carboxylic acids as well as prenyl ethers to alcohols. This study involved the critical evaluation of solvent, time, and temperature that finally led to an efficient protocol for the formation of tert-butyl ethers. Yb(OTf)3 catalyzed the formation of tert-butyl ethers, notably reducing the reaction time, which is exemplified by the achievement of up to 92% conversion of alcohols to tert-butyl ethers within an hour. Additionally, the report demonstrates the utility of this synthetic protocol for the protection of carboxylic acids.
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Affiliation(s)
- Arshpreet Kaur
- Department
of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Arshdeep Pannu
- Department
of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Deshkanwar S. Brar
- Department
of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Surinder K. Mehta
- Department
of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Deepak B. Salunke
- Department
of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
- National
Interdisciplinary Centre of Vaccines, Immunotherapeutics and Antimicrobials, Panjab University, Chandigarh 160014, India
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Kawabata H, Hirama T, Yanagisawa T, Sato K, Kogure N, Kitajima M, Takayama H. Asymmetric Total Synthesis of Biphenylquinolizidine Alkaloids 4″- O-Demethyllythridine and 14- epi-4″- O-Demethyllythridine. Org Lett 2019; 21:7982-7986. [PMID: 31524399 DOI: 10.1021/acs.orglett.9b02962] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first asymmetric total synthesis of new biphenylquinolizidine alkaloids 4″-O-demethyllythridine and 14-epi-4″-O-demethyllythridine isolated from Heimia salicifolia was accomplished. The key steps in the synthesis were a copper(I)-catalyzed asymmetric intramolecular aza-Michael reaction to build a chiral 4-arylquinolizidine unit and an intramolecular Suzuki-Miyaura cross-coupling reaction to construct a macrolactone ring comprising a biphenyl moiety.
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Affiliation(s)
- Haruka Kawabata
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Taku Hirama
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Tomomi Yanagisawa
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Keigo Sato
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Noriyuki Kogure
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Mariko Kitajima
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Hiromitsu Takayama
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana , Chuo-ku, Chiba 260-8675 , Japan
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