Enantioselective Friedel-Crafts Aminoalkylation Catalyzed by Chiral Ammonium 1,1′-Binaphthyl-2,2′-disulfonates
作者:Kazuaki Ishihara、Manabu Hatano、Yoshihiro Sugiura、Matsujiro Akakura
DOI:10.1055/s-0030-1260538
日期:2011.6
A catalytic enantioselective Friedel-Crafts aminoalkylation between aromatic aldimines and N-benzylpyrrole with the use of a homogeneous chiral ammonium salt, (R)-BINSA-N,N-dimethylbutylamine, as a dynamic Brønsted acid-Brønsted base catalyst, is reported. Unlike the results with conventional catalysts, remarkably high reactivity was established at -78 ËC within 30 minutes, and the corresponding aryl(1H-pyrrol-2-yl)methanamines were obtained with good to high enantioselectivities.
报道了使用均相手性铵盐 (R)-BINSA-N,N-二甲基丁胺作为动态布朗斯台德酸-布朗斯台德碱催化剂,在芳香醛亚胺和 N-苄基吡咯之间进行催化对映选择性弗里德尔-克来福特氨烷基化反应。与传统催化剂的结果不同,在-78℃下30分钟内建立了非常高的反应活性,并获得了具有良好至高对映选择性的相应芳基(1H-吡咯-2-基)甲胺。