Short Syntheses of (±)-Grandisol and (±) Lineatin<i>via</i>, a common Intermediate
作者:Ivana Aljancic-Solaja、Max Rey、André S. Dreiding
DOI:10.1002/hlca.19870700510
日期:1987.8.12
6-step synthesis of (±)-grandisol (1) is presented, which involves dichloroketene addition to 3-methyl-3-butenyl acetate (4), reductive dechlorination of the adduct 6 to the ketone 7 and saponification to 8, aldolization of 7 or 8 with acetone and cyclization to the bicyclic ketone 9, Wolff-kishner, reduction to 14, and finally ring opening to 1. Since 9 is a known intermediate of the synthesis of (±)-lineatin
提出了(±)-大丁醇(1)的六步合成方法,其中包括将二氯乙烯烯加到乙酸3-甲基-3-丁烯酯(4)中,将加合物6还原脱氯为酮7并皂化为8,醛醇缩合将7或8用丙酮环化成双环酮9(Wolff-kishner),还原成14,最后开环成1。由于9是合成(±)-lineatin(2)的已知中间体,后者现在可以通过6个步骤获得。