for the preparation of enantiomericallyenriched C 2 -symmetrical vicinal diamines via the addition of organometallic reagents to a chiral bisimine, which gives access to a variety of optically pure aromatic and aliphatic C 2 -symmetrical vicinal diamines in high yields. The 'Cram-Davis' open transition state model is proposed to rationalize the observed stereoselectivities for the addition of organolithium
通过将有机金属试剂添加到手性双亚胺中,开发了一种有效且直接的制备对映体富集的 C 2 对称邻二胺的方法,该方法可以获得各种光学纯的芳香族和脂肪族 C 2 对称邻二胺高产量。提出了“Cram-Davis”开放过渡态模型,以合理化观察到的将有机锂试剂添加到双亚胺中的立体选择性。