Enantioselective synthesis of aziridine 2,2-dicarboxylates. Part I: Copper(II)-bisoxazoline complex-catalysed Michael reaction on alkylidene malonates
作者:Giuliana Cardillo、Serena Fabbroni、Luca Gentilucci、Massimo Gianotti、Rossana Percacciante、Alessandra Tolomelli
DOI:10.1016/s0957-4166(02)00340-3
日期:2002.7
The preparation of aziridine-2,2-dicarboxylates via 1,4-addition of N,O-bis(trimethylsilyl)hydroxylamine to α,β-unsaturated malonates in the presence of chiral Lewis acids is reported. Good enantioselectivity was observed for conjugate addition catalysed by [Cu(S,S)-Bn-(box)](OTf)2 on isobutylidene and 3-methylbutylidene malonate.
报道了在手性路易斯酸存在下,通过将N,O-双(三甲基甲硅烷基)羟胺的1,4-加成至α,β-不饱和丙二酸酯来制备氮丙啶-2,2-二羧酸酯。对于[Cu(S,S)-Bn-(box)](OTf)2在异丁烯和3-甲基丁烯丙二酸酯上的催化,观察到良好的对映体选择性。