The reaction of epoxy aldehydes with tetraethyl methylenediphosphonate gave γ,δ-epoxy vinyl phosphonates. The palladium-catalyzed addition of primary alcohols gave the monoprotected diols as single diastereoisomers. The trans- and cis-epoxides lead to opposite (syn and anti) diastereoisomers of the addition products. The alkene of the vinyl phosphonates was subjected to hydrogenation, and the resulting
环氧醛与亚甲基
二膦酸四
乙酯的反应生成γ,δ-环氧
乙烯基膦酸酯。
钯催化的伯醇的加成得到单保护的非对映异构体的单保护的二醇。该反式-与顺
环氧化物导致相反(顺式和反)的加成产物的对映异构体。对
乙烯基膦酸酯的烯烃进行氢化,然后将所得的饱和
膦酸酯进行碱催化的环化反应,从而在
磷原子上形成新的手性中心时,得到具有非常高非对映选择性的
磷矿。