Synthesis and structural conformation of N-substituted 1,4-dihyropyridine derivatives

N-(Phenyl)-3,5-dicarbethoxy-2,6-dimethyl-4-(phenyl)-1,4-dihydropyridine (A) and N-(4-methoxy phenyl)3,5 dicarbethoxy-2,6 dimethyl-4-(3-nitro phenyl)-1,4-dihydropyridine (13) has been synthesized as per scheme and characterized by the X-ray diffraction method. The compound A crystallizes in monoclinic space group P2(1)/c with cell parameters a = 9.2770(11)angstrom, b = 8.6410(5)angstrom, c = 27.601(3)angstrom, beta = 97.724(3)degrees, Z = 4. The compound B crystallizes in monoclinic space group P2(1)/c with cell parameters a = 11.229(6), b = 12.746(7)angstrom, c = 17.606(6)angstrom, beta = 104.531(3)degrees, Z = 4. The structures exhibit both intra and intermolecular hydrogen bonds. Dihydropyridine ring of both the compounds adopt a flat boat conformation.