Six new indole alkaloids from Gelsemium sempervirens Ait. f.
作者:Noriyuki Kogure、Chika Nishiya、Mariko Kitajima、Hiromitsu Takayama
DOI:10.1016/j.tetlet.2005.06.136
日期:2005.8
One new yohimbane and five new sarpagine-type indole alkaloids were isolated from the radix of Gelsemium sempervirens Ait. f., and their structures were determined by spectroscopic analysis, chemical conversion or total synthesis. It was found that 2-acyl sarpagine-type alkaloids possessing an Nb-methyl group take a keto–amino structure or a transannular form in solution depending on the solvent.
一个新yohimbane和五个新sarpagine型吲哚生物碱从的基数分离钩吻杉艾特。f。其结构是通过光谱分析,化学转化或全合成确定的。发现具有N b-甲基的2-酰基沙雷帕金型生物碱在溶液中取决于溶剂而具有酮氨基结构或跨环形式。