作者:Chris Lorenc、Jonathan T. Reeves、Carl A. Busacca、Chris H. Senanayake
DOI:10.1016/j.tetlet.2015.01.161
日期:2015.3
Tertiary amides containing an N-isopropyl group were selectively deprotected by heating in methanesulfonic acid. The N-isopropyl group was removed selectively in the presence of other groups on the amide nitrogen such as methyl, primary alkyl, or aryl. The putative isopropyl cation was trapped by Friedel–Crafts alkylation of anisole when the latter was included as a co-solvent.
通过在甲磺酸中加热,将含有N-异丙基的叔酰胺选择性地脱保护。该Ñ -异丙基团是在酰胺氮上的其它基团,例如甲基,伯烷基或芳基的存在下选择性地除去。当将苯甲醚作为助溶剂加入时,假定的异丙基阳离子会被苯甲醚的Friedel-Crafts烷基化捕获。