novel chiral bisphosphine-thiourea ligand was developed and applied in the highly enantioselective hydrogenation of β,β-disubstituted nitroalkenes (up to 99% yield and 99% ee). With low catalytic loading (0.25 mol %), 98% ee and 98% conversion were obtained. The thiourea group takes on an important role in this catalytic system.
开发了一种新型的手性
双膦硫脲配体,并将其用于β,β-二取代硝基烯烃的高对映选择性加氢反应(产率高达99%,ee高达99%)。在低催化负荷(0.25mol%)下,获得98%的ee和98%的转化率。
硫脲基在该催化体系中起重要作用。