Synthesis of racemic chiral-at-metal complexes of the Group 4 metals
作者:Nathaniel W Alcock、Howard J Clase、David J Duncalf、Suzanne L Hart、Andrew McCamley、Peter J McCormack、Paul C Taylor
DOI:10.1016/s0022-328x(00)00253-9
日期:2000.6
ched products can not be isolated due to formation of complexes between the Group 4 metallocene products and the borane by-products. An efficient method for synthesis of racemic chiral-at-metal metallocenes, through lithium chloride catalysed ligand redistribution reactions, is described. Sterically-hindered racemic chiral-at-metal complexes are prepared by nucleophilic substitution of prochiral dichlorides