Chiral Lewis Base Catalyzed Highly Enantioselective Reduction of N-Alkyl β-Enamino Esters with Trichlorosilane and Water
作者:Xinjun Wu、Yang Li、Chao Wang、Li Zhou、Xiaoxia Lu、Jian Sun
DOI:10.1002/chem.201003105
日期:2011.3.1
of a chiral Lewis base catalyst 2, the supposedly moisture‐unfriendly reduction system with trichlorosilane was found to be highly efficient and enantioselective when using water as an additive. For the first time, this method enables the reduction of a broad range of N‐alkyl β‐enamino esters 1 to give N‐alkyl β‐amino esters 3 in good to high yields and with excellent enantioselectivities (see scheme)
首先,测试水!在手性路易斯碱催化剂2的存在下,发现当使用水作为添加剂时,据说具有三氯硅烷的水分不友好的还原体系是高效且对映选择性的。对于第一次,这种方法使得大范围的还原Ñ烷基β-烯酯1,得到ñ -烷基β-氨基酯3以良好至高产率和具有优异的对映选择性(参见方案)。