Chiral phosphinoylimines were prepared from methylphenylphosphonamides and tested as new chiral and activated imines. The addition of aluminum acetylides was proved to be highly diastereoselective while lithium or magnesium acetylides gave poor results. The cleavage of the chiral auxiliary was done under mild conditions and allows the recovery of the starting phosphonamide without loss of optical purity
                                    由甲基
苯基膦酰胺制备手性膦基
嘧啶,并作为新的手性和活化
亚胺进行测试。事实证明,添加
乙炔铝具有很高的非对映选择性,而
乙炔酸
锂或
镁的添加效果较差。手性助剂的裂解是在温和的条件下进行的,并且可以回收起始的膦酰胺而不会损失光学纯度。