Cooperativity in the counterion catalysis of Morita/Baylis/Hillman reactions promoted by enantioselective trifunctional organocatalysts
作者:Christopher Anstiss、Fei Liu
DOI:10.1016/j.tet.2010.05.007
日期:2010.7
New trifunctionalorganocatalysts with a NHTs Brønsted acid were prepared and tested in their ability to promote the counterion catalysis of generic and aza-Morita/Baylis/Hillman reactions. The cooperativity between the counterion and the NHTs Brønsted acid of the trifunctional catalyst was required for good enantioselectivity and rate enhancement. Better enantioselectivity was observed for aza-MBH