The diastereoselectivenucleophilicaddition of alkyllithium to N-alkylidene-alpha-naphthylethylamine was carried out. In the presence of Lewis acids or Lewis bases, organolithiums reacted smoothly with imines to give the corresponding amines in high stereoselectivity (up to 100% de). Furthermore, the resulting opticallyactive amines were found to be useful for asymmetric reactions as chiral ligands
It was observed that diastereofacial selectivity in the addition reaction of organometallics to the chiral imines derived from (R)-2-methoxy-1-phenylethylamine was regulated under appropriate conditions; i. e., organolithium and organocerium reagents added from the re-face of the chiral imines selectively, while organocopper reagents attacked from the si-face. The utility of the present method was
观察到有机金属化合物与衍生自 (R)-2-甲氧基-1-苯乙胺的手性亚胺的加成反应中的非对映选择性在适当条件下得到调节;即,有机锂和有机铈试剂从手性亚胺的表面选择性地添加,而有机铜试剂从硅表面攻击。本方法的效用在 solenopsin A 的对映选择性合成中得到了证明。