Novel chromone-8-aldehydes and thiochromone-8-aldehydes, useful in making pharmaceutically active dihydropyridines, of the formula ##STR1## in which R.sub.1 represents hydrogen, a C.sub.1 -C.sub.10 aliphatic hydrocarbon radical, a C.sub.1 -C.sub.10 alkyl carboxylate, or an aromatic or heteroaromatic ring which optionally has 1-5 identical or different halogen, C.sub.1 -C.sub.10 -alkyl, C.sub.1 -C.sub.10 -alkoxy, C.sub.1 -C.sub.10 -alkylthio, C.sub.1 -C.sub.10 -alkylsulphinyl, cyano, hydroxyl, nitro, C.sub.1 -C.sub.5 -monofluoroalkyl or polyfluoroalkyl, C.sub.1 -C.sub.5 monofluoroalkoxy or polyfluoroalkoxy, C.sub.1 -C.sub.6 monofluoroalkylthio or polyfluoroalkylthio, amino, C.sub.1 -C.sub.5 -monoalkylamino or C.sub.1 -C.sub.5 dialkylamino substituents, R.sub.2 represents hydrogen or 1 to 3 halogen atoms, A represents a single bond, a C.sub.1 -C.sub.20 alkylene chain or a C.sub.2 -C.sub.20 alkylene chain which can optionally be interrupted by oxygen or sulphur, and X represents oxygen or sulphur, are made from corresponding compounds which in 8-position carry an ester or olefinic radical.
新型的8-酮基
色酮和8-
硫酮基
色酮,可用于制备具有药理活性的
二氢吡啶,其
化学式为##STR1##其中R.sub.1代表氢、C.sub.1-C.sub.10脂肪烃基、C.sub.1-C.sub.10烷基
羧酸酯或含有1-5个相同或不同的卤素、C.sub.1-C.sub.10-烷基、C.sub.1-C.sub.10-烷氧基、C.sub.1-C.sub.10-烷基
硫基、C.sub.1-C.sub.10-烷基磺酰基、
氰基、羟基、硝基、C.sub.1-C.sub.5-单氟烷基或多氟烷基、C.sub.1-C.sub.5-单氟烷氧基或多氟烷氧基、C.sub.1-C.sub.6-单氟烷基
硫基或多氟烷基
硫基、
氨基、C.sub.1-C.sub.5-单烷基
氨基或C.sub.1-C.sub.5-二烷基
氨基取代基,R.sub.2代表氢或1至3个卤素原子,A代表单键、C.sub.1-C.sub.20烷基链或可选地由氧或
硫断开的C.sub.2-C.sub.20烷基链,X代表氧或
硫。这些化合物可从8-位带有酯或烯丙基基团的对应化合物中制得。