Access to Diarylmethanols by Wittig Rearrangement of <i>ortho-</i>, <i>meta-</i>, and <i>para-</i>Benzyloxy-<i>N</i>-Butylbenzamides
作者:R. Alan Aitken、Andrew D. Harper、Ryan A. Inwood、Alexandra M. Z. Slawin
DOI:10.1021/acs.joc.1c03160
日期:2022.4.1
promoter of the [1,2]-Wittig rearrangement of aryl benzyl ethers and thus allow the two-step synthesis of isomerically pure substituted diarylmethanols starting from simple hydroxybenzoic acid derivatives. The method is compatible with a wide range of functional groups including methyl, methoxy, and fluoro, although not with nitro and, unexpectedly, is applicable to meta as well as ortho and para isomeric
已发现N-丁基酰胺基团 CONHBu 是芳基苄基醚的 [1,2]-Wittig 重排的有效促进剂,因此允许从简单的羟基苯甲酸衍生物开始两步合成异构纯的取代的二芳基甲醇. 该方法与包括甲基、甲氧基和氟在内的多种官能团兼容,但不适用于硝基,而且出乎意料的是,该方法适用于间位以及邻位和对位异构体系列。