Thirupathi Yerram Reddy

(Z)-2-Amino-5-[2,4-dimeth-oxy-6-(4-methoxy-styr-yl)benzyl-idene]-1,3-thia-zol-4(5H)-one methanol solvate.

In the crystal structure of the title compound, C21H20N2O4S·CH3OH, molecules are linked into chains by a series of intermolecular N—H⋯O, N—H⋯N and O—H⋯O hydrogen bonds. The molecular structure shows a double bond with Z geometry, connecting the thiazolone and resveratrol units. The dihedral angle between the thiazolone ring and the nearest dimethoxybenzene ring is 53.02 (7)°.

3-(2-Amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)-3-hydr­oxy-1-phenyl­indolin-2-one ethanol solvate

In the title compound, C18H16N4O3·C2H5OH, molecules are linked into chains by a series of intermolecular N—H⋯O, N—H⋯N and O—H⋯O hydrogen bonds which stabilize the crystal structure. The indole and creatinine units make a dihedral angle of 56.45 (4)°. The title compound has two chiral centres. The crystal structure indicates the compound is racemic (RR and SS).

(Z)-4-[3-(2,5-Dioxoimidazolidin-4-ylidenemeth­yl)-1H-indol-1-ylmeth­yl]benzonitrile

In the title compound, C20H14N4O2, molecules are linked into chains by N—H⋯O hydrogen bonds, but the cyano group does not participate in the supramolecular aggregation. The crystal structure of the compound indicates the presence of a double bond with Z geometry, connecting the imidazolidine and indole units. The dihedral angle between the imidazole and benzene ring planes is 62.45 (4)°.

(E,E)-1-Methyl-2,6-distyrylpyridinium iodide.

In the title compound, C22H20N+·I−, the dihedral angles between the central pyridine ring and two outer benzene rings are 15.30 (10) and 11.82 (11)°. There are intermolecular π–π stacking interactions between the nearest phenyl ring over an inversion-related pyridyl ring, the shortest centroid–centroid distance being 3.672 (3) Å. The crystal structure of the compound indicates the 2,6-distyryl substituents have an E configuration.

3-(2-Amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)-3-hydroxy­indolin-2-one monohydrate

Two chiral centres exist in the title compound, C12H12N4O3·H2O. Molecules are linked into chains by series of intermolecular N—H⋯O and O—H⋯N hydrogen bonds, which causes supramolecular aggregation. Two chiral centres are formed in the title compound. The indole and creatinine moieties make a dihedral angle of 56.75 (4)°. The crystal structure of the compound indicates the presence of equimolar enantiomers (RR and SS) in the crystal structure.

(Z)-Methyl 4-({3-[(2,5-dioxoimidazolidin-4-yl­idene)meth­yl]-1H-indol-1-yl}meth­yl)benzoate

In the title compound, C21H17N3O4, pairs of molecules form a planar[maximum deviation 0.0566 (9) Å] centrosymmetric imidazole dimer via two N—H⋯O hydrogen bonds. These dimeric units are linked by further N—H⋯O hydrogen bonds between the ester carbonyl group and the imidazolidine ring, formiing chains parallel to the c-axis direction. In addition, there are π–π stacking interactions between the planar imidazole pairs, with an interplanar spacing of 3.301 (2) Å. There is a double bond with Z geometry connecting the imidazolidine and indole units.

3-(2-Amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)-5-fluoro-3-hydr­oxy-1-methyl­indolin-2-one methanol hemisolvate

In the title compound, C13H13FN4O3·0.5CH3OH, molecules are packed in the crystal structure by a series of O—H⋯N, N—H⋯O, N—H⋯F and O—H⋯O intermolecular hydrogen bonds. The indole and creatinine units make a dihedral angle of 60.80 (4)°.

rac-2-(2-Amino-4-oxo-4,5-dihydro-1,3-thia-zol-5-yl)-2-hydroxy-indane-1,3-dione.

In the crystal of the title compound, C12H8N2O4S, molecules are linked into chains by a series of intermolecular O—H⋯O, N—H⋯O and N—H⋯N hydrogen bonds. The ninhydrin and aminothiazolidine units make a dihedral angle of 66.41 (3)°. The crystal structure indicates the presence of equimolar R and S enantiomers in the crystal lattice, due to the presence of a chiral centre in the title compound.

(2Z,3E)-2-{[1-(4-Chloro­benz­yl)-1H-indol-3-yl]methyl­idene}quinuclidin-3-one oxime

In the title compound, C23H22ClN3O, the benzene ring of the 4-chorobenzyl group makes a dihedral angle of 78.56 (6)° with the best plane of the indole ring. The double bond connecting the azabicyclic and indole groups adopts a Z geometry. The geometry adopted by the C=N bond with respect to the N—OH bond is trans. The absolute configuration of the compound was determined from refinement of the Flack parameter.

(Z)-Methyl 4-[3-(3-oxoquinuclidin-2-yl­idenemeth­yl)-1H-indol-1-ylmeth­yl]benzoate

The title compound, C25H24N2O3 was prepared by the reaction of (Z)-2-(1H-indol-3-ylmethylene)-1-azabicyclo[2.2.2]octan-3-one with methyl p-(bromomethyl)benzoate, under phase-transfer catalytic (PTC) conditions using triethylbenzylammonium chloride and 50% w/v aqueous NaOH solution in dichloromethane. The crystal structure indicates the presence of a double bond with Z geometry connecting the azabicyclic and indole groups.