Towards a universal organocatalyst for the synthesis of enantioenriched phenylalanine derivatives by enantioselective decarboxylative protonation
作者:Morgane Pigeaux、Romain Laporte、David C. Harrowven、Jérôme Baudoux、Jacques Rouden
DOI:10.1016/j.tetlet.2016.09.001
日期:2016.10
Access to enantioenriched non-proteogenic phenylalanine derivatives is described using the enantioselectivedecarboxylative protonation reaction of amidohemimalonate esters catalysed by various cinchona-based compounds. This study compares the catalytic efficiency as well as the enantioselectivity induced by three types of common organocatalysts, namely thioureas, squaramides and bis-cinchona squaramides