Aluminum Triflate as a Powerful Catalyst for Direct Amination of Alcohols, Including Electron‐Withdrawing Group‐Substituted Benzhydrols
作者:Takashi Ohshima、Junji Ipposhi、Yasuhito Nakahara、Ryozo Shibuya、Kazushi Mashima
DOI:10.1002/adsc.201200536
日期:2012.9.17
Direct aminations of allylic alcohols, benzylic alcohols, and benzhydrols with electron‐withdrawing (F, Br, I, NO2, or CN) substituents were efficiently catalyzed by aluminum triflate [Al(OTf)3] to afford the corresponding biarylamines in high yield, and the dibromo‐substituted product was further transformed into letrozole.
三氟甲磺酸铝[Al(OTf)3 ]有效催化具有吸电子(F,Br,I,NO 2或CN)取代基的烯丙醇,苄醇和苯羟基的直接胺化,从而以高收率提供相应的联芳基胺,然后将二溴取代的产物进一步转化为来曲唑。