Silver-Catalyzed Enantioselective Mannich Reaction of Diazoacetate Esters with <i>N</i>-Boc Aldimines
作者:Gerard P. Robertson、Alistair J. M. Farley、Darren J. Dixon
DOI:10.1021/acs.joc.9b03177
日期:2020.2.21
The highly enantioselective Mannich reaction of diazoacetate esters with N-Boc aldimines catalyzed by silver(I) triflate in the presence of (R)-DM-SEGPHOS is reported. The reaction is broad in scope with respect to the (hetero)aromatic aldehyde-derived aldimine and tolerates significant variability of the diazoacetate ester component. Yields and enantioselectivities are good to excellent, and the reaction
据报道,在(R)-DM-SEGPHOS存在下,三氟甲磺酸银(I)催化重氮乙酸酯与N-Boc醛亚胺的高度对映选择性曼尼希反应。关于(杂)芳族醛醛衍生的亚胺,反应的范围很广,并且可以容忍重氮乙酸酯组分的显着可变性。产率和对映选择性良好至极好,并且反应可以以克级进行,催化剂负载量低至1 mol%。