New multifunctional chiral phosphine (phosphine-amide type) LB8 and BINOL derivative co-catalyzed asymmetric aza-MBH reaction of 5,5-disubstituted cyclopent-2-enones 1 with N-sulfonated imines 2 afforded the corresponding optically active adducts 3 in good to outstanding yields with moderate to good ee's under mild conditions. The steric hindrance environment of BINOL derivatives as well as the nucleophilicity
新型多功能手性膦(膦酰胺型)LB8和5,5-二取代的环戊-2-烯酮衍
生物BINOL共催化不对称氮杂MBH反应1与Ñ -sulfonated
亚胺2,得到相应的光学活性的加合物3在好在温和条件下具有中等到良好ee的出色产量。讨论了BINOL衍
生物的空间位阻环境以及
磷中心的亲核性和游离OH的酸度,它们可能显着影响立体
化学和
化学结果,这表明共催化体系对于这种特定的不对称氮杂非常重要。 MBH反应。