A novel type of pyrrolidine-based chiral (thio)phosphoramidates was synthesized. Among them, compound (S,aR)-3d was proven to be an effective bifunctional organocatalyst for the asymmetric Michaeladdition of ketones to nitroolefins. The corresponding adducts were obtained in good to excellent chemical yields with high levels of diastereo- and enantioselectivities (up to >99:1 dr and 99 % ee).
合成了一种新型的基于吡咯烷的手性(硫代)氨基磷酸酯。其中,化合物 (S,aR)-3d 被证明是一种有效的双功能有机催化剂,用于酮与硝基烯烃的不对称迈克尔加成。相应的加合物以良好到优异的化学产率获得,具有高水平的非对映选择性和对映选择性(高达 >99:1 dr 和 99% ee)。