Catalytic asymmetric synthesis of β-hydroxy ketones by palladium-catalyzed asymmetric 1,4-disilylation of α,β-unsaturated ketones
作者:Yonetatsu Matsumoto、Tamio Hayashi、Yoshihiko Ito
DOI:10.1016/s0040-4020(01)80758-4
日期:1994.1
1,4-Disilylation of β,β-unsaturated ketones with 1,1-dichloro-l-phenyl-2,2,2-trimethyldisilane proceeded in the presence of phosphine-palladium catalysts in benzene. High enantio-selectivity (up to 92%) was observed in the disilylation with dichloro[(R)-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl]palladium(II) as a catalyst (0.5 mol %). The disilylation products, 1-(trimethyisilyloxy)-3-(dichlorophenylsilyl)propenes
在苯存在膦-钯催化剂的情况下,将β,β-不饱和酮与1,1-二氯-1-苯基-2,2,2-三甲基乙硅烷进行1,4-二甲化。使用二氯[(R)-2,2'-双(二苯基膦基)-1,1'-联萘]钯(II)(0.5 mol% )。容易将二甲硅烷基化产物1-(三甲基甲硅烷基氧基)-3-(二氯苯基甲硅烷基)丙烯转化为旋光性的α-未取代或抗α-取代的β-(苯基二甲基甲硅烷基)酮,其氧化反应生成相应的旋光性β-羟基酮高产。