The chemistry of octamethyl-1,2-disilacyclobutane. Some SiSi cleavage and insertion reactions
作者:Dietmar Seyferth、Emma W. Goldman、Jean Escudié
DOI:10.1016/0022-328x(84)85187-6
日期:1984.8
the SiSi bond of the disilacyclobutane. The stoichiometric reaction of the disilacyclobutane and (Ph3P)2PdCl2 gave ClMe2SiCMe2CMe2SiMe2Cl and the 1,1-bis(triphenylphosphine)-2,2,3,3,4,4,5,5-octamethyl-1-pallada-2,5-disilacyclopentane. The latter reacted with phenylacetylene to give the same product which was obtained in the catalyzed reaction. This suggests that the catalyzed process involves initial
八甲基1,2-二硅环丁烷对空气非常敏感。它的SiSi键很容易被水,HCl,CF 3 CO 2 H,Cl 2,Br 2和有机锂试剂裂解。在(Ph 3 P)2 PdCl 2存在下,各种乙炔,共轭二烯和丙二烯插入二硅环丁烷的SiSi键中。二硅环丁烷与(Ph 3 P)2 PdCl 2的化学计量反应得到ClMe 2 SiCMe 2 CMe 2 SiMe 2Cl和1,1-双(三苯基膦)-2,2,3,3,4,4,5,5-八甲基-1-钯-2,5-二硅环戊烷。后者与苯乙炔反应,得到在催化反应中获得的相同产物。这表明催化过程涉及将(Ph 3 P)2 PdCl 2初始还原为(Ph 3 P)2 Pd并将后者插入二硅环丁烷的SiSi键中。