Cyclisation of α,β,γ,ψ-unsaturated dioic acid esters via tandem conjugate additions by using lithium N-benzyltrimethylsilylamide (LSA) as a nitrogen nucleophile and its application to a total synthesis of (±)-dihydronepetalactone and (±)-isodihydronepetalactone
作者:Tadao Uyehara、Naomi Shida、Yoshinori Yamamoto
DOI:10.1039/c39890000113
日期:——
A stereoselective total synthesis of (±)-dihydronepetalactone and (±)-isodihydronepetalactone has been accomplished by utilising a novel cyclisation procedure; a reaction of octadiene-2,6-dioic acid esters with lithium N-benzyltrimethylsilylamide (LSA) induces 5-exo-Trig ring-closure via tandem conjugate additions.
(±)-二氢荆芥内酯和(±)-异二氢荆芥内酯的立体选择性全合成已经通过利用新颖的环化方法完成。辛二烯-2,6-二酸酯与N-苄基三甲基甲硅烷基氨基锂(LSA)的反应通过串联共轭物加成引发5-exo-Trig闭环。