A catalyticasymmetricsynthesis of nitrogen-containing gem-bisphoshonates is described. A Lewis acid-Bronsted base bifunctional homodinuclear Ni 2 ―Schiff base complex promoted catalytic enantioselective conjugate addition of nitroacetates to ethylidenebisphosphonates, giving products in up to 93% ee and 94% yield. Transformation of the product into a chiral α-amino ester with a gem-bisphosphonate
描述了含氮双膦酸盐的催化不对称合成。路易斯酸-布朗斯台德碱双功能同双核 Ni 2 -希夫碱配合物促进硝基乙酸酯催化对映选择性共轭加成到亚乙基双膦酸酯,得到高达 93% ee 和 94% 产率的产物。还描述了将产物转化为具有双膦酸酯部分的手性 α-氨基酯。