The stereocontrolled conjugate addition of anions derived from chiral α-chlorophosphonamides to α,β-unsaturated esters leads to the corresponding 3-chloro ester adducts which undergo intramolecular expulsion of the chlorine atom to give the corresponding cyclopropanes.
衍生自手性α-
氯膦酰胺的阴离子到α,β-不饱和酯的立体控制共轭加成反应导致相应的3-
氯酯加合物发生分子内的
氯原子排出,从而得到相应的
环丙烷。