Organometallic Gold(III) Compounds as Catalysts for the Addition of Water and Methanol to Terminal Alkynes
作者:Raquel Casado、María Contel、Mariano Laguna、Pilar Romero、Sergio Sanz
DOI:10.1021/ja036049x
日期:2003.10.1
detected in the stoichiometric reaction between [Au(C(6)F(5))(2)Cl](2) and phenylacetylene that was followed by variable temperature (1)H, (19)F[(1)H], COSY (19)F[(1)H]-(19)F[(1)H], and (2)H[(1)H] NMR experiments. Compound [Au(C(6)F(5))(2)Cl](2) is also able to catalyze the hydration of phenylacetylene at room temperature. A plausible mechanism for the hydration reaction has been proposed.
不同的无机和有机金属金 (III) 和金 (I) 配合物已在向末端炔烃中加入水和甲醇进行了测试。阴离子和中性有机金属金 (III) 化合物可以在回流甲醇的中性介质中有效地介导这些反应。化合物以催化量(相对于炔烃为1.6-4.5 mol%)加入。因此,通式 Q[AuRCl(3)]、Q[AuR(2)Cl(2)]、[AuRCl(2)](2) 和 [AuR(2)Cl](2) (Q = BzPPh(3)(+), PPN: N(PPh(3))(2)(+) 或 N(Bu)(4)(+); R = C(6)F(5) 或 2,4 ,6-(CH(3))(3)C(6)H(2)) 在三键的亲核加成中似乎表现得像路易斯酸。在 [Au(C(6)F(5))(2)Cl](2) 和苯乙炔之间的化学计量反应中可以检测到一些中间体,然后是可变温度 (1)H、(19)F[(1) )H], 舒适 (19)F[(1)H]-(19)F[(1)H]