Catalytic Asymmetric Mannich Reaction of Glycine Derivatives with
<i>N</i>
‐Tosylimines using Copper(I)/TF‐BiphamPhos Complex
作者:Gang Liang、Min‐Chao Tong、Haiyan Tao、Chun‐Jiang Wang
DOI:10.1002/adsc.201000252
日期:2010.10.9
The direct asymmetric Mannich reaction of glycine Schiff bases with N-tosylimines has been developed with the tetrakis(acetonitrile)copper(I) tetrafluoroborate [Cu(CH3CN)4BF4]/TF-BiphamPhos complex. This catalytic system performs well over a broad range of substrates, furnishing anti-adducts of various α,β-diamino acid esters in good yields with up to 94:6 diastereoselectivity and 97% enantioselectivity
用四(乙腈)铜(I)四氟硼酸酯[Cu(CH 3 CN)4 BF 4 ] / TF-BiphamPhos络合物开发了甘氨酸席夫碱与N-甲苯磺酰亚胺的直接不对称曼尼希反应。该催化体系在广泛的底物上表现良好,以高达94:6的非对映选择性和97%的对映选择性提供了各种α,β-二氨基酸酯的抗加合物。