作者:Jason D. Masuda、Aaron J. Hoskin、Todd W. Graham、Chad Beddie、Maria C. Fermin、Nola Etkin、Douglas W. Stephan
DOI:10.1002/chem.200600429
日期:2006.11.24
Catalytic dehydrocoupling of phosphines was investigated using the anionic zirconocene trihydride salts [Cp*2Zr(mu-H)3Li]3 (1 a) or [Cp*2Zr(mu-H)3K(thf)4] (1 b), and the metallocycles [CpTi(NPtBu3)(CH2)4] (6) and [Cp*M(NPtBu3)(CH2)4] (M=Ti 20, Zr 21) as catalyst precursors. Dehydrocoupling of primary phosphines RPH2 (R=Ph, C6H2Me3, Cy, C10H7) gave both dehydrocoupled dimers RP(H)P(H)R or cyclic oligophosphines
使用三氧化锆茂金属盐[Cp * 2Zr(mu-H)3Li] 3(1a)或[Cp * 2Zr(mu-H)3K(thf)4](1b)研究了膦的催化脱氢偶联。金属环[CpTi(NPtBu3)(CH2)4](6)和[Cp * M(NPtBu3)(CH2)4](M = Ti 20,Zr 21)作为催化剂前体。伯膦RPH2(R = Ph,C6H2Me3,Cy,C10H7)的脱氢偶联反应既产生了脱氢偶联的二聚体RP(H)P(H)R或环状低聚膦酸(RP)n(n = 4,5),而tBu3C6H2PH2的反应则给出了磷吲哚tBu2(Me2CCH2)C6H2PH 9.这些催化剂前体与伯膦的化学计量反应得到[Cp * 2Zr((PR)2)H] [K(thf)4](R = Ph 2,Cy 3,C6H2Me3 4),[ Cp * 2Zr((PPh)3)H] [K(thf)4](5),[CpTi(NPtBu3)(PPh