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【论文发表】Strategies for total synthesis of bispyrrolidinoindoline alkaloids

2022年03月24日 14:55  点击:[]

Strategies for total synthesis of bispyrrolidinoindoline alkaloids
Ma, Zhixian; Zhou, Ankun; Xia, Chengfeng*
Natural Product Reports
DOI:
10.1039/d1np00060h

Published: 2022-March (online)

https://pubs.rsc.org/en/content/articlelanding/2022/NP/D1NP00060H

 

Abstract

Covering up to 2021

Complex cyclotryptamine alkaloids with a bispyrrolidino[2,3-b]indoline (BPI) skeleton are an intriguing family of natural products, exhibiting wide systematic occurrences, large structural diversity, and multiple biological activities. Based on their structural characteristics, BPI alkaloids can be classified into chimonanthine-type BPI alkaloids, BPI diketopiperazines, and BPI epipolythiodiketopiperazines. These intricate molecules have captivated great attention soon after their isolation and identification in the 1960s. Due to the structural complexity, the total synthesis of these cyclotryptamine alkaloids is challenging. Nevertheless, remarkable progress has been achieved in the last six decades; in particular, several methods have been successfully established for the construction of vicinal all-carbon quaternary stereocenters. In this review, the structural diversity and chemical synthesis of these BPI alkaloids were summarized. BPI alkaloids are mainly synthesized by the methods of oxidative dimerization, reductive dimerization, and alkylation of bisoxindole. The purpose of this review is to present overall strategies for assembling the BPI skeleton and efforts towards controlling the stereocenters.




 

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