Prenylcoumarins from Murraya paniculata var. omphalocarpa(Rutaceae): The Absolute Configuration of Sibiricin, Mexoticin and Omphamurin.
作者:Takeshi KINOSHITA、Jin-Bin WU、Feng-Chi HO
DOI:10.1248/cpb.44.1208
日期:——
Three new prenylcoumarins, murpaniculol senecioate, 5-methoxymurrayatin and omphamurin isovalerate were isolated from the leaves of Murraya paniculata var. omphalocarpa (Rutaceae), together with six known coumarins, paniculatin, (-)-sibiricin, 5, 7-dimethyoxy-8-(3'-methyl-2'-oxobutyl)coumarin, (-)-mexoticin, omphamurin and omphalocarpin. Their structures were characterizied on the basis of spectroscopic evidence. The absolute configulation of omphamurin at the C-2' position has been determined to be S by Horeau's method. THe absolute stereochemistry of (-)-mexoticin and (-)-sibiricin has also been established by their chemical correlation with omphamurin.
从Murraya paniculata var. omphalocarpa(芸香科)的叶子中分离出三种新的异戊烯基香豆素,即murpaniculol senecioate、5-甲氧基murrayatin和omphamurin isovalerate,以及六种已知的香豆素,即paniculatin、(-)-sibiricin、5,7-dimethyoxy-8-(3'-methyl-2'-oxobutyl)coumarin、(-)-mexoticin、omphamurin和omphalocarpin。根据光谱学证据确定了它们的结构。通过Horeau的方法确定omphamurin在C-2'位置的绝对构型为S。通过(-)-mexoticin和(-)-sibiricin与omphamurin的化学相关性,也确定了它们的绝对立体化学。