Preparation of CF<sub>3</sub>-Containing 1,3-Di- and 1,1,3-Trisubstituted Allenes
作者:Takashi Yamazaki、Takahiro Yamamoto、Ritsuko Ichihara
DOI:10.1021/jo060909l
日期:2006.8.1
Novel synthetic pathway to access trifluoromethylated allenes with 1,3-di- as well as 1,1,3-trisubstitution patterns was developed from a variety of 4,4,4-trifluorobut-2-yn-1-ols which were then transformed into the corresponding vinylic iodides in highly regio- and stereospecific manners, and zinc-mediated β-elimination after trifluoroacetylation of the hydroxyl group eventually realized the formation
从各种4,4,4-trifluorobut-2-yn-1-ols开发出新颖的合成途径,以合成具有1,3-二-和1,1,3-三取代模式的三氟甲基化的亚丙基以高度区域和立体有择的方式转化为相应的乙烯基碘,在羟基的三氟乙酰化后,锌介导的β-消除最终实现了目标分子的形成,并且可以在短短的步骤中以良好或优异的总收率实现目标分子的形成。