作者:Margaret M. Faul、Andrew M. Ratz、Kevin A. Sullivan、William G. Trankle、Leonard L. Winneroski
DOI:10.1021/jo0103064
日期:2001.8.1
ketone 15 in 81% yield. Saponification of 15 and reaction with 50% aqueous NH(2)OH in AcOH afforded a 9:1 mixture of cis and trans oximes, from which the desired cis-oxime 2 was isolated in 43% yield. The core bromo-dihydronaphthalene 29 required for the synthesis of 3-5 was prepared by a Shapiro reaction. Transmetalation of 29 and reaction with Weinreb amides 30b or 36 afforded ketones 32 and 37, which
类维生素A 1-5已被确定为有效的RXR激动剂,可用于治疗非胰岛素依赖型(II型)糖尿病(NIDDM)。已经开发了1-5的高度收敛的合成。使用AlCl(3)催化(0.03当量)甲苯与2,5-二氯-2,5-二甲基己烷的Friedel-Crafts烷基化反应以98%的产率制备用于1和2合成的核心四氢萘7 6.开发了用氯甲基烟酸酯9的硝基甲烷介导的Fridel-Crafts 7的酰化反应,以68%的产率制备酮10。将螯合剂控制的MeMgCl加入10中,然后进行脱水,以65%的收率得到烯烃11。用三甲基磺酸ox叶立德对11进行环丙烷化,然后进行皂化,完成了1的五步合成,产率为33%。FeCl(3)催化(0。05当量)用对苯二甲酸氯甲酯14对7进行Friedel-Crafts酰化,得到酮15,产率为81%。皂化15并与50%NH(2)OH在AcOH中的水溶液反应,得到顺式和反式肟的9:1混合物,从其