Diastereo- and enantioselective preparation of oxazolines via the base-catalysed aldol reaction of isocyanoacetates with aldehydes using cinchona alkaloids
作者:Rui-Chuan Diao、Wen-Tao Zhao、Shen Li
DOI:10.3184/174751916x14683198156665
日期:2016.9
A diastereo- and enantioselective base-catalysed aldol reaction of t-butyl isocyanoacetate with aldehydes under phase-transfer catalytic conditions yielded 19 4,5-disubstituted oxazolines, 16 of which are novel. Key to success was the use of a free 9-OH-containing cinchona alkaloid-based quaternary ammonium salt bearing bulky and electron-withdrawing aryl groups on the N-benzyl moiety. This process