Nitrophenyl di:hydro-pyridine deriv. prepn.

摘要

3-Ethoxycarbonyl 5-methoxy-carbonyl 2,6-dimethyl 4-(3-nitro phenyl) 1,4-dihydro pyridine of formula (I) with vaso-dilator properties, is made by reacting a benzylidene aceto-acetate ester of formula (II) with a beta-amino crotonate ester of formula (III). The ester (II) is made by reaction of an acetoacetate ester with 3-nitro benzaldehyde.