FcCH(R)OH与等摩尔量的Bu n Li和EtOCOCl进行一锅反应,然后加入过量的胺,可生成N-(α-二茂铁基烷基)胺,产率最高可达98%。氮杂芳基胺在氨基上经历α-二茂铁基烷基化。醇和酚(R'OH)的α-二茂铁基烷基化导致醚FcCH(R)OR'的形成,产率较低。反应通过碳酸α-二茂铁基烷基酯FcCH(R)OCOOEt的中间形成而进行。讨论了与此协议相关的副反应。
Acidic-functionalized ionic liquid as an efficient, green, and metal-free catalyst for benzylation of sulfur, nitrogen, and carbon nucleophiles to benzylic alcohols
作者:Xue-Qiang Chu、Ran Jiang、Yi Fang、Zheng-Yang Gu、Hua Meng、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1016/j.tet.2012.11.045
日期:2013.1
A series of HSO4- functionalized ILs was synthesized and used as efficient, green, and metal-free catalysts for benzylation. Notably, the catalytic system has wide substrate scopes and the ionic liquid catalysts were applied to investigate three different types of nucleophiles to give the desired benzylation products with moderate to excellent yields. (C) 2012 Elsevier Ltd. All rights reserved.