1,4-Dihydropyridines characterized by a carbo(arylalkoxy) group in the 5-position, an aryl group in the 4-position and a alkanoyl or carbalkoxy group in the 3-position and further optionally substituted in the 1,2 and 6-positions are coronary dilating, spasmolytic and hypotensive agents. The compounds, of which 2,6-dimethyl-3-carbomethoxy-4-(2-nitrophenyl)-5-carbobenzoxy-1,4-dihydropy ridine is a representative embodiment, are prepared through the reaction of an ylidene-.beta.-dicarbonyl compound, which may be generated in situ from the corresponding .beta.-dicarbonyl compound and an aldehyde, and an enaminocarboxylic acid ester, which may also be generated in situ from a .beta.-dicarbonyl compound and an amine.
在1,4-
二氢吡啶中,其5位上特征为羧基(芳基氧基)基团,4位上为芳基基团,3位上为烷酰基或羧基烷基基团,而在1,2和6位上进一步可选择性地取代,这些化合物是冠状动脉扩张、解痉和降压剂。这些化合物的代表性实施例包括2,6-二甲基-3-羧甲氧基-4-(2-
硝基苯基)-5-羧苯甲酰基-1,4-
二氢吡啶,通过β-二羰基化合物的反应生成物(可由相应的β-二羰基化合物和醛在原位生成)和恩
氨基
羧酸酯的反应生成物(也可由β-二羰基化合物和胺在原位生成)制备而成。