Study on the Pd/C-Catalyzed (Retro-)Michael Addition Reaction of Activated Methylene Compounds to Electron-Poor Styrenes
作者:Nicolai I. Nikishkin、Jurriaan Huskens、Willem Verboom
DOI:10.1002/ejoc.201000961
日期:2010.12
(10% Pd/C) efficiently catalyzes the (retro-)Michael addition of activatedmethylenecompounds 2a-d, such as malononitrile (2b), to mono- and doubly activated styrenes 1a-h to give the adducts 3a-1. The scope and limitations are described. The Knoevenagel condensation reaction of benzaldehyde and 2b or ethyl cyanoacetate (2c) is also catalyzed by 10 % Pd/C. In these cases the Michaeladducts can even