We report the [YN(SiMe3)2}3] catalysed dehydrocoupling of triphenylphosphonium methylide with phenylsilane to form the silylated ylide Ph3PCHSiH2Ph. Attempts to catalyse this reaction with the related group 2 hexamethyldisilazide base [CaN(SiMe3)2}2] led to the catalytic formation of the phosphine Ph2PCHSiH2Ph along with Ph2PMe in low selectivity, while group 1 bases [MN(SiMe3)2}] (M = Li, Na, K) proved ineffective for both transformations. The stoichiometric reactions of Ph3PCH2 with [MN(SiMe3)2}n] have been investigated and allowed the isolation and characterisation of a cyclometallated phosphonium methylide complex of yttrium.
我们报告了[YN(SiMe3)2}3]催化三苯基
甲基膦与苯基
硅烷的脱氢偶联反应,生成
硅烷化的矢量 Ph3PCHSiH2Ph。尝试用相关的第 2 族六甲基二
硅氮化物碱[CaN(SiMe3)2}2]来催化这一反应,结果以较低的选择性催化形成了膦 Ph2PCHSiH2Ph 和 Ph2PMe,而第 1 族碱[MN(SiMe3)2}](M = Li、Na、K)对这两种转化均无效。我们研究了 Ph3PCH2 与 [MN(SiMe3)2}n] 的
化学反应,并分离和鉴定了一种环
金属化的甲基化膦
钇络合物。