Towards more chemically robust polymer-supported chiral catalysts for the reactions of aldehydes with dialkylzincs
作者:Roger J. Kell、Philip Hodge、Mohammad Nisar、David Watson
DOI:10.1016/s0960-894x(02)00276-7
日期:2002.7
N-Methyl-alpha,alpha-diphenyl-L-prolinol derivatives with para-bromo substituents in one or both of the phenyl rings are easily bound to crosslinked polystyrene beads containingphenylboronicacidresidues using Suzuki reactions. When the products were used as catalysts for the reactions of aldehydes with diethylzinc in toluene at 20 degrees C, the alcohols were produced in chemical yields >90% and