Rhodium/tris-binaphthyl chiral monophosphite complexes: Efficient catalysts for the hydroformylation of disubstituted aryl olefins
作者:Rui M.B. Carrilho、A.C.B. Neves、Mirtha A.O. Lourenço、Artur R. Abreu、Mário T.S. Rosado、Paulo E. Abreu、M. Ermelinda S. Eusébio、László Kollár、J. Carles Bayón、Mariette M. Pereira
DOI:10.1016/j.jorganchem.2011.10.007
日期:2012.2
considerably the catalytic activity on the hydroformylation of 1,1- and 1,2-disubstituted aryl olefins. The kinetics of the hydroformylation of trans-1-phenyl-1-propene, using tris[(R)-2′-benzyloxy-1,1′-binaphthyl-2-yl]phosphite as model ligand, was investigated. A first order dependence in the hydroformylation initial rate with respect to substrate and catalyst concentrations was found, as well as a positive
的家庭三重对称亚磷酸酯配体,P(O-BIN-OR)3(BIN = 2,2'-联萘; R = Me中,BN,CHPh配合2,1-金刚烷基),从对映异构纯衍生([R)-BINOL , 发展了。使用PM6哈密顿量计算得出亚磷酸酯配体的锥角在240-270°范围内。他们的铑配合物原位形成在相对温和的反应条件下,在受阻苯基丙烯的加氢甲酰化反应中显示出显着的催化活性,对醛具有完全的化学选择性,对区域的选择性高,而对映选择性低。配体上的醚取代基对1,1-和1,2-二取代的芳基烯烃加氢甲酰化反应的催化活性有很大影响。以三[[ R ] -2'-苄氧基-1,1'-联萘-2-基]亚磷酸酯为模型配体,研究了反式-1-苯基-1-丙烯的加氢甲酰化反应动力学。发现加氢甲酰化起始速率相对于底物和催化剂浓度呈一阶依赖性,相对于H 2的分压呈正阶关系。,相对于亚磷酸酯浓度和CO分压,则为负数。