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.
3,5-二酰基-4-苯基-1,4-二氢吡啶是通过将Ph 2 Cu(CN)Li 2的区域和化学选择性加成到β-取代的N-烷基吡啶鎓盐中,然后将中间体1酰化而合成的,4-二氢吡啶与三氯乙酸酐和随后的卤仿型反应。使用N-甲硅烷基吡啶鎓盐和PhMgBr的相似序列使得可以制备相应的N-未取代的二氢吡啶。