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 aromatic imines (see scheme; Boc=tert‐butoxycarbonyl).
使其紧紧:在X射线结构的指导下,重新设计了含有活化分子内氢键的双功能
硫脲催化剂。新型催化剂用于实现
丙二酸酯与脂族和芳族
亚胺之间的高度对映选择性曼尼希反应(参见方案; Boc =叔丁氧羰基)。