Modification of Chiral Monodentate Phosphine (MOP) Ligands for Palladium-Catalyzed Asymmetric Hydrosilylation of Styrenes
作者:Tamio Hayashi、Seiji Hirate、Kenji Kitayama、Hayato Tsuji、Akira Torii、Yasuhiro Uozumi
DOI:10.1246/cl.2000.1272
日期:2000.11
In the palladium-catalyzed asymmetric hydrosilylation of styrene with trichlorosilane, several chiral monophosphine ligands, (R)-2-diarylphosphino-1,1′-binaphthyls (2), were examined for their enantioselectivity. The highest enantioselectivity was observed in the reaction with (R)-2-bis[3,5-bis(trifluoromethyl)phenyl]phosphino-1,1′-binaphthyl (2g), which gave (S)-1-phenylethanol of 98% ee after oxidation of the hydrosilylation product.
在钯催化的苯乙烯与三氯硅烷的不对称氢化硅烷化反应中,研究了几种手性单膦配体 (R)-2-二芳基膦基-1,1'-联萘 (2) 的对映选择性。在与 (R)-2-双[3,5-双(三氟甲基)苯基]膦基-1,1'-联萘 (2g) 的反应中观察到最高的对映选择性,得到 98 的 (S)-1-苯基乙醇氢化硅烷化产物氧化后的%ee。