Modification of Chiral Monodentate Phosphine Ligands (MOP) for Palladium-Catalyzed Asymmetric Hydrosilylation of Cyclic 1,3-Dienes
作者:Tamio Hayashi、Jin Wook Han、Akira Takeda、Takeda Tang、Kenji Nohmi、Kotaro Mukaide、Hayato Tsuji、Yasuhiro Uozumi
DOI:10.1002/1615-4169(20010330)343:3<279::aid-adsc279>3.0.co;2-5
日期:2001.3.30
Several MOP ligands 5 containing aryl groups at 2′ position of (R)-2-(diphenylphosphino)-1,1′-binaphthyl skeleton were prepared and used for palladium-catalyzed asymmetric hydrosilylation of cyclic 1,3-dienes 6 with trichlorosilane. Highest enantioselectivity was observed in the reaction of 1,3-cyclopentadiene (6a) catalyzed by a palladium complex (0.25 mol %) coordinated with (R)-2-(diphenylphosphino)-2′-(3
制备了几个在(R)-2-(二苯基膦基)-1,1'-联萘骨架的2'位置含有芳基的MOP配体5,并将其用于钯催化的环1,3-二烯6与三氯硅烷的不对称氢化硅烷化。在与(R)-2-(二苯基膦基)-2'-(3,5-二甲基-4- )配位的钯配合物(0.25 mol%)催化的1,3-环戊二烯(6a)反应中观察到最高的对映选择性甲氧基苯基)-1,1'-联萘基(5f),得到90%ee的(S)-3-(三氯甲硅烷基)环戊烯。