1-Chloro-4-(3,4-dichloro­phen­yl)-3,4-dihydro­naphthalene-2-carbaldehyde

The title compound, C17H11Cl3O, was synthesized via the Vilsmeier–Haack reaction. The dihydro­naphthalene ring system is non-planar, the dihedral angle between the two fused rings being 10.87 (13)°; it forms a dihedral angle of 81.45 (10)° with the dichloro­phenyl ring. The crystal structure features inter­molecular C—H⋯O hydrogen bonds

1-{4-Chloro-2-[2-(2-fluoro­phen­yl)-1,3-dithio­lan-2-yl]phen­yl}-2-methyl-1H-imidazole-5-carbaldehyde

There are two mol­ecules in the asymmetric unit of the title imidazole derivative, C20H16ClFN2OS2. In one mol­ecule, the dithiol­ane ring is disordered over two positions in a 0.849 (9):0.151 (10) ratio. The imidazole ring makes dihedral angles of 79.56 (9) and 18.45 (9)° with the 4-chloro­phenyl and 2-fluoro­phenyl rings, respectively, in one mol­ecule; in the other mol­ecule, the corresponding angles are 82.72 (9) and 17.39 (10)°. In the crystal, mol­ecules are linked by weak C—H⋯O inter­actions and these linked mol­ecules are stacked along the b axis by π–π inter­actions with a centroid–centroid distance of 3.4922 (11) Å. In addition, π–π inter­actions between the imidazole and 2-fluoro­phenyl rings are also observed, with centroid–centroid distances of 3.4867 (11) and 3.4326 (10) Å. The crystal is further consolidated by weak C—H⋯π inter­actions. Cl⋯S [3.5185 (8) Å], C⋯O [3.192 (3) Å] and C⋯C [3.326 (2)–3.393 (3) Å] short contacts are also observed

3-{1-[4-(2-Methyl­prop­yl)phen­yl]eth­yl}-4-phenyl-1H-1,2,4-triazole-5(4H)-thione

In the title compound, C20H23N3S, the central 1,2,4-triazole ring makes dihedral angles of 69.76 (9) and 81.69 (8)°, respectively, with the phenyl and benzene rings. In the crystal, mol­ecules are linked into a centrosymmetric dimer by a pair of inter­molecular N—H⋯S hydrogen bonds, generating an R 2 2(8) ring motif

Benzyl N-{2-[5-(4-chloro­phen­yl)-1,2,4-oxadiazol-3-yl]propan-2-yl}carbamate

In the title 1,2,4-oxadiazole derivative, C19H18ClN3O3, the 1,2,4-oxadiazole ring makes dihedral angles of 12.83 (8) and 4.89 (8)°, respectively, with the benzyl and 4-chloro­phenyl rings, while the dihedral angle between the benzyl and 4-chloro­phenyl rings is 11.53 (7)°. In the crystal, mol­ecules are linked by N—H⋯N hydrogen bonds into helical chains along the b axis. A weak C—H⋯π inter­action is also present

(5E)-5-(4-Meth­oxy­benzyl­idene)-2-(piperidin-1-yl)-1,3-thia­zol-4(5H)-one

In the title compound, C16H18N2O2S, the piperidine ring adopts a chair conformation. The central 4-thia­zolidinone ring makes dihedral angles of 12.01 (7) and 51.42 (9)°, respectively, with the benzene ring and the least-squares plane of the piperidine ring. An intra­molecular C—H⋯S hydrogen bond stabilizes the mol­ecular structure and generates an S(6) ring motif. In the crystal, mol­ecules are linked into a tape along the c axis by inter­molecular C—H⋯O hydrogen bonds

Synthetic and biological studies on 5-(p-chlorophenyl)furan-2-carboxyl peptides and 4-[2'-(5'-formyl)furyl]benzoyl peptides

370-37

N′-(4-Fluoro­benzyl­idene)-2-(4-fluoro­phen­yl)acetohydrazide

In the title compound, C15H12F2N2O, the dihedral angle between the two benzene rings is 48.73 (8)°. The hydrazine group is twisted slightly, with a C—N—N—C torsion angle of 172.48 (12)°. In the crystal, mol­ecules are connected by strong N—H⋯O and weak C—H⋯O hydrogen bonds, forming supra­molecular chains along the c axis. The structure is consolidated by π–π [centroid–centroid separation = 3.6579 (10) Å] and C—H⋯π inter­actions

N′-(4-Chloro­benzyl­idene)-2-[4-(methyl­sulfan­yl)phen­yl]acetohydrazide

In the title compound, C16H15ClN2OS, the hydrazine group is twisted slightly: the C—N—N—C torsion angle is 175.46 (13)°. The dihedral angle between the two terminal aromatic rings is 87.01 (8)°. In the crystal, inversion dimers linked by pairs of N—H⋯O hydrogen bonds generate R 2 2(8) loops. The dimers are further linked by weak C—H⋯π inter­actions

(5E)-5-(2,4-Dichloro­benzyl­idene)-2-(piperidin-1-yl)-1,3-thia­zol-4(5H)-one

In the title compound, C15H14Cl2N2OS, the piperidine ring adopts a chair conformation. The dihedral angle between the thia­zolidine ring and the dichloro­benzene ring is 9.30 (4)°; this near coplanar conformation is stabilized by the formation of an intra­molecular C—H⋯S hydrogen bond, which generates an S(6) ring. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds, forming [001] chains. Weak π–π inter­actions [centroid–centroid separation = 3.5460 (5) Å] consolidate the structure

N-[2-(1H-Indol-3-yl)-1-(5-thioxo-4,5-dihydro-1,3,4-oxadiazol-2-yl)ethyl]-4-methylbenzenesulfonamide

N-[1-Hydrazinyl-3-(1H-indol-3-yl)-1-oxopropan-2-yl]-4-methylbenzenesulfonamide (1) on cyclization with carbon disulfide in ethanolic potassium hydroxide affords N-[2-(1H-indol-3-yl)-1-(5-thioxo-4,5-dihydro-1,3,4-oxadiazol-2-yl)ethyl]-4-methylbenzenesulfonamide (2) in 84% yield. The structure of compound 2 was supported by mass spectrometry, FT-IR and 1H- and 13C-NMR spectroscopy. To investigate the potential of compound 2 to act as antitubercular agent, it was docked against the enoyl reductase (InhA) enzyme of Mycobacterium tuberculosis. The docking pose and non-covalent interactions gave insights on its plausible inhibitory action