Cooperative Assistance in Bifunctional Organocatalysis: Enantioselective Mannich Reactions with Aliphatic and Aromatic Imines
作者:Nicolas Probst、Ádám Madarász、Arto Valkonen、Imre Pápai、Kari Rissanen、Antti Neuvonen、Petri M. Pihko
DOI:10.1002/anie.201203852
日期:2012.8.20
bifunctional thiourea catalysts containing an activating intramolecular hydrogen bond were redesigned. The new catalysts were used to effect a highly enantioselective Mannich reaction between malonates and both aliphatic and aromaticimines (see scheme; Boc=tert‐butoxycarbonyl).