Z-Selective olefination of base-sensitive chiral β-hydroxy-α-aminoaldehydes using a modified Horner-Wadsworth-Emmons reaction
作者:Frank Rübsam、Antje M. Evers、Christoph Michel、Athanassios Giannis
DOI:10.1016/s0040-4020(96)01091-5
日期:1997.2
The HWE reaction of base-sensitive chiral beta-hydroxy-alpha-aminoaldehydes (serinals) was achieved under mild conditions with complete Z-selectivity using bis(trifluoroethyl) phosphonates and LiCl, DBU in THF. The use of the corresponding dimethyl phosphonates resulted in a mixture off and Z-configurated products, the ratio of which was found to depend on the size of the ester group. (C) 1997, Elsevier Science Ltd.