Catalytic activity of cis-[μ-[bis(1,1-dimethylethyl)-phosphino]]dicarbonyl-μ-chlorobis[tris(1,1-dimethylethyl)-phosphine]dirhodium and of its chiral analog (+)-cis-[μ-[bis-(1,1-dimethylethyl)phosphino]]dicarbonyl-μ-chlorobis[[5β-methyl-2α-(1α-methylethyl)cyclohexyl]-diphenylphosphine]dirhodium
作者:Evelina Berkovich、Aharona Jacobson、Jochanan Blum、Herbert Schumann、Martin Schäfers、Holger Hemling
DOI:10.1016/0022-328x(92)85030-z
日期:1992.9
The title compounds 5a and 5b, which contain one bridging phosphido- and one bridging chloro-ligand, have been made by reaction of [Rh(CO)2(μ-Cl)]2 (1) with the phosphine tBu3P (2a) or (+)-neomenthyldiphenylphosphine (2b) followed by treatment of the resulting complexes [(R2R′P)Rh(CO)(μ-Cl)]2(3) with Me3SiPtBu2 (4). Compounds 5a and 5b are highly active catalysts for isomerization of allylbenzene,
标题化合物5a和5b通过[Rh(CO)2(μ-Cl)] 2(1)与膦t Bu 3 P(2a)或(+)-新烷基二苯基膦(2b),然后用Me 3 SiP t Bu 2(4)处理所得的络合物[(R 2 R'P)Rh(CO)(μ-Cl)] 2(3)。 。化合物5a和5b是用于烯丙基苯异构化,苯乙烯和(Z)-α-乙酰氨基二十二酸甲基酯的氢化以及环己烯的加氢甲酰化的高活性催化剂。手性络合物5b促进前手性脱氢氨基酸衍生物的对映选择性氢化。