Enantioselective conjugate reduction of α,β-unsaturated carboxamides with semicorrin cobalt catalysts
作者:Peter von Matt、Andreas Pfaltz
DOI:10.1016/s0957-4166(00)86123-6
日期:1991.1
Chiral semicorrin cobalt complexes, prepared in situ from cobalt(II) chloride and the free ligands, are efficient, highly enantioselective catalysts for the conjugate reduction of alpha,beta-unsaturated carboxamides with sodium borohydride. Enantiomeric excesses of up to 99 %, essentially quantitative yields, and high substrate/catalyst ratios (1 000 - 10 000:1) are attractive attributes of this catalytic process.