Asymmetric total synthesis of novel pentacyclic indole alkaloid, kopsiyunnanine E, isolated from Kopsia arborea.

Mariko Kitajima,Yosuke Murakami,Nobuaki Takahashi,Yuqiu Wu,Noriyuki Kogure,Rong-Ping Zhang,Hiromitsu Takayama

ORGANIC LETTERS（2014）

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摘要

A new pentacyclic indole alkaloid, kopsiyunnanine E, was isolated from Yunnan Kopsia arborea, and its structure, which was inferred from spectroscopic data was established by a 16-step asymmetric total synthesis that proved that the natural alkaloid was not enantiomerically pure.

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