Catalytic Asymmetric Aziridination of Enol Derivatives in the Presence of Chiral Copper Complexes to give Optically Active α-Amino Ketones
作者:Waldemar Adam、Konrad Johann Roschmann、Chantu Ranjan Saha-Möller
DOI:10.1002/(sici)1099-0690(200002)2000:3<557::aid-ejoc557>3.0.co;2-b
日期:2000.2
A series of acyclic and cyclic enol derivatives 1 has been transformed into the corresponding α-amino-functionalized ketones 2 by means of enantioselective catalytic aziridination with chiral Cu complexes, prepared in situ from [Cu(MeCN)4]PF6 and the optically active ligands 3, by using (N-tosylimino)iodobenzene (PhINTs) as a nitrogen source. The best enantioselectivities (ee values of up to 52%) have
一系列无环和环状烯醇衍生物 1 已通过与手性 Cu 配合物的对映选择性催化氮丙啶化反应转化为相应的 α-氨基官能化酮 2,由 [Cu(MeCN)4]PF6 和光学活性配体原位制备3,通过使用(N-甲苯磺胺基)碘苯(PhINTs)作为氮源。电子失活的烯醇乙酸酯 1aδ 已经实现了最佳的对映选择性(ee 值高达 52%),但空间体积的引入和烯醇双键处的取代模式并没有提高 ee 值。与它们的无环对应物(完全消耗)相比,环状底物的反应要慢得多(仅高达 45% 的转化率)。