Diastereoselective addition of methyllithium and dimethylcuprate-boron trifluoride to imines derived from (S)-1-phenylethylamine
作者:Giuseppe Alvaro、Diego Savoia、Maria R. Valentinetti
DOI:10.1016/0040-4020(96)00746-6
日期:1996.9
trifluoride reagents with the imines derived from (S)-1-phenylethylamine afforded the secondary amines by addition to the Si face of the imines. (S,S)-bis(1-phenylethyl)amine and (S)-1-cyclohexylethanamine were prepared with high stereoselectivity, in the latter case by a two step sequence involving the final cleavage of the auxiliary. Methyllithium attacked mainly the Si face of the imines derived from 4-pyridine
通过将二甲基铜酸酯-三氟化硼试剂与衍生自(S)-1-苯基乙胺的亚胺反应,可通过向亚胺的Si表面添加仲胺得到仲胺。(S,S)-双(1-苯乙基)胺和(S)-1-环己基六胺以高的立体选择性制备,在后一种情况下,通过涉及最终裂解助剂的两步顺序制备。甲基锂主要攻击由4-吡啶羧醛和2-甲氧基苯甲醛衍生的亚胺的Si面,但对由2-吡啶和2-呋喃羧醛衍生的亚胺的Re面具有侵蚀作用。