Title of article :
Six new indole alkaloids from Gelsemium sempervirens Ait. f.
Author/Authors :
Kogure، نويسنده , , Noriyuki and Nishiya، نويسنده , , Chika and Kitajima، نويسنده , , Mariko and Takayama، نويسنده , , Hiromitsu، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2005
Abstract :
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.
Keywords :
Structure elucidation , NMR , Isomerization , Solvent effect , indole alkaloid , Gelsemium , total synthesis
Journal title :
Tetrahedron Letters
Journal title :
Tetrahedron Letters
