3-Methyl-1-(prop-2-en-1-yl)quinoxalin-2(1H)-one

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(2E)-3-(2-Chloro-6-methyl-3-quinolyl)-1-(1-naphthyl)prop-2-en-1-one

In the title mol-ecule, C(23)H(16)ClNO, the quinoline and naphthalene ring systems are individually planar, with maximum deviations of 0.020 (2) and 0.033 (2) Å, respectively, and are inclined at a dihedral angle of 30.01 (4)°. Intra-molecular C-H⋯O and C-H⋯Cl inter-actions occur. The crystal structure is devoid of any classical hydrogen bonds, but symmetry-related mol-ecules are linked via wea...

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3-(4-Chlorophenyl)-1-(2-methyl-4-phenylquinolin-3-yl)prop-2-en-1-one

The crystal structure of the title compound, C(25)H(18)ClNO, shows that the mol-ecules are isolated and not involved in inter-molecular C-H⋯O or C-H⋯Cl inter-actions. However, the phenyl and quinoline rings are involved in π-π inter-actions [centroid-centroid distance = 3.8829 (9) Å].

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(2E)-3-(4-Bromophenyl)-1-(2-methyl-4-phenyl-3-quinolyl)prop-2-en-1-one

The conformation about the ethene bond [1.316 (3) Å] in the title compound, C(25)H(18)BrNO, is E. The quinoline ring forms dihedral angles of 67.21 (10) and 71.68 (10)° with the benzene and bromo-substituted benzene rings, respectively. Highlighting the non-planar arrangement of aromatic rings, the dihedral angle formed between the benzene rings is 58.57 (12)°.

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1-(4-Chlorophenyl)-3-(5-methyl-2-furyl)prop-2-en-1-one

The title compound, C(14)H(11)ClO(2), was prepared from 4-chloro-hypnone and 5-methyl-furfural by an aldol condensation reaction. The dihedral angle formed between the two benzene rings is 7.71 (2)°. The crystal structure is stabilized by C-H⋯O inter-actions.

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