(3R,4R,5R,6R)-3,6-Diphenyl-N,N'-bis[(S)-1-phenylethyl]octa-1,7-diene-4,5-diamine, by treatment with organolithium reagents RLi in controlled experimental conditions, underwent rearrangement and/or substitution of one or two branched allyl(s) by the R group(s). Hence, this diene behaves as a masked form of the chiral glyoxal diimine from that it is prepared, allowing the preparation of C1-symmetric 1,2-disubstituted 1,2-diamines, which are generally not available by the direct addition of organometallic reagents to the diimine, and C2-symmetric 1,2-diamines with good diastereoselectivities.
(3R,4R,5R,6R)-3,6-二苯基-N,N'-双[(S)-1-苯乙基]辛-1,7-二烯-4,5-二胺,经过在受控实验条件下使用有机锂试剂RLi处理后,发生了一个或两个支链烯丙基的重排和/或取代反应,由此,这个二烯烃表现出手性乙二酰亚胺的伪装形式,因此可以制备C1-对称的1,2-二取代的1,2-二胺,这些通常无法通过将有机金属试剂直接加入到乙二酰亚胺中得到,以及具有良好对映选择性的C2-对称的1,2-二胺。