The present invention relates to a process for the production of (−)3,4-divanillyl tetrahydrofiran of formula (2) which comprises (a) isolating) (−) secoisolariciresinol of formula (1) from the heartwood and roots of Taxus wallichiana by an improved process which consists of partitioning of the alcoholic extract of the heartwood and roots of T. wallichiana between water and chlorinated solvent, (b) extracting the chlorinated solvent extract with alkali and (c) isolating (−) secoisolariciresinol from the alkali extract upon neutralization with mineral acid and extracting with organic solvent and (d) crystallizing it from suitable organic solvent, (e) dissolving the isolated (−) secoisolariciresinol in suitable organic solvent and (f) reacting with triphenyl phosphine halide at 0-80° C. for 1-10 hours and (g) isolating (−) 3,4-divanillyl tetrahydrofuran by column chromatography.
本发明涉及一种制备(-)3,4-二香草醚
四氢呋喃的方法,其包括(a)通过改进的过程从红豆杉木心材和根部中分离出(-)secoisolariciresinol(
化学式1),该过程包括将红豆杉木心材和根部的
酒精提取物在
水和
氯代溶剂之间分配,(b)用碱提取
氯代溶剂
提取物,(c)在矿物酸中和有机溶剂中提取(-)secoisolariciresinol,(d)从适当的有机溶剂中结晶出来,(e)在适当的有机溶剂中溶解分离的(-)secoisolariciresinol,(f)在0-80°C下用
三苯基膦卤化物反应1-10小时,(g)通过柱层析分离(-)3,4-二香草醚
四氢呋喃。