Highly Enantioselective One-Pot, Three-Component Mannich-type Reaction Catalyzed by an<i>N</i>,<i>N</i>′-Dioxide-Scandium(III) Complex
作者:Shikui Chen、Zongrui Hou、Yin Zhu、Jing Wang、Lili Lin、Xiaohua Liu、Xiaoming Feng
DOI:10.1002/chem.200900392
日期:2009.6.8
three‐component Mannich‐type reaction of aldehydes, 2‐aminophenol, and ketene silyl acetal with 5 mol % of a C2‐symmetric N,N′‐dioxide‐based scandium(III) triflate (2:1) complex as the catalyst was achieved under mild conditions (see scheme), which facilitated the asymmetric synthesis of biologically interesting β‐amino esters.
温和的曼尼希反应:醛,2-氨基苯酚和乙烯酮甲硅烷基乙缩醛与5 mol%的C 2对称的N,N'-二氧化‐基(的高对映选择性一锅,三组分曼尼希型反应III)在温和的条件下(参见方案)获得了三氟甲磺酸酯(2:1)络合物作为催化剂,这促进了生物学上有趣的β-氨基酯的不对称合成。