Synthesis of 3,5-diacyl-4-phenyl-1,4-dihydropyridines
作者:M.-Lluïsa Bennasar、Cecília Juan、Joan Bosch
DOI:10.1016/s0040-4039(98)02084-x
日期:1998.12
via a regio- and chemoselective addition of Ph2Cu(CN)Li2 to β-substituted N-alkylpyridinium salts, followed by acylation of the intermediate 1,4-dihydropyridines with trichloroacetic anhydride and subsequent haloform-type reaction. A similar sequence using an N-silylpyridinium salt and PhMgBr allows the preparation of the corresponding N-unsubstituted dihydropyridines.