The new 2,9-dimethyl-4H-oxazolo[5’,4’:4,5]pyrano[3,2-f]quinolin-4-one was successfully prepared through the three-component iodine-catalyzed reaction of n-butyl vinyl ether with 8-amino-2-methyl-4H-chromeno[3,4-d]oxazol-4-one. latter by reduction 2-methyl-8-nitro-4H-chromeno[3,4-d]oxazol-4-one Pd/C in a hydrogen atmosphere. above nitro compound synthesized condensation N-(4-hydroxy-6-nitro-2-ox...

In the title compound, C(19)H(15)N(3)O(3), the anilino and benzamide rings make dihedral angles of 10.66 (16) and 50.39 (16)°, respectively, with the nitro-substituted benzene ring. The nitro group is slightly twisted by 11.49 (17)° with respect to the attached benzene ring. There is an intra-molecular N-H⋯O hydrogen bond forming an S(6) ring. In the crystal, weak inter-molecular N-H⋯O and C-H⋯...

In the title moleclue, C(13)H(10)N(4)O(3), the methyl-idene-hydrazide [-C(=O)-N-N=C-] fragment is essentially planar, with a maximum deviation of 0.0228 (7) Å. The mean planes of the benzene and pyridine rings make dihedral angles of 25.44 (6) and 5.47 (7)°, respectively, with the mean plane of the methyl-idene-hydrazide fragment. In the crystal structure, inter-molecular N-H⋯N hydrogen bonds l...

In the mol-ecule of the title compound, C(12)H(16)N(2)O(4), an intra-molecular N-H⋯O hydrogen bond results in the formation of a six-membered ring having an envelope conformation. In the crystal structure, a bifurcated intra/intermolecular N-H⋯(O,O) hydrogen bond generates inversion dimers.