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Search Results: 1 - 10 of 138729 matches for " K. Chinnakali "
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1,3-Dicyclohexyl-1-(4-nitrobenzoyl)urea
A. N. Dhinaa,R. Jagan,K. Sivakumar,K. Chinnakali
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810016107
Abstract: In the title compound, C20H27N3O4, both cyclohexane rings adopt chair conformations. The benzene ring and the amide group are oriented at a dihedral angle of 62.1 (2)°. In the crystal structure, intermolecular N—H...O and C—H...O hydrogen bonds link the molecules into chains propagating in [010], which contain R22(12) ring motifs.
3-Benzyl-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexahydro-1H-pyrrolo[3,4-b]quinoline
K. Chinnakali,D. Sudha,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809044547
Abstract: In the title compound, C31H30N2O2S, the pyrrolidine ring adopts a twist conformation while the tetrahydropyridine ring is in a half-chair conformation. The two rings are trans-fused. The pyridine-bound phenyl ring forms dihedral angles of 17.7 (1) and 48.1 (1)°, respectively, with the tosyl and benzyl phenyl rings. The molecular structure is stabilized by an N—H...π interaction involving the benzyl phenyl ring. In the crystal structure, molecules translated by one unit along the a axis are linked into chains by C—H...π interactions involving the benzene ring of the tosyl group.
cis-1-Ethyl-4,4,6,8-tetramethyl-2-tosyl-2,3,3a,4,6,7,8,9-octahydro-1H-pyrrolo[3′,4′:3,4]pyrano[6,5-d]pyrimidine-7,9-dione
K. Chinnakali,D. Sudha,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809026361
Abstract: In the title compound, C22H29N3O5S, the pyrrolidine ring is cis-fused to the dihydropyran ring. The pyrrolidine and dihydropyran rings adopt twist and half-chair conformations, respectively. The molecule is in a folded conformation; the sulfonyl-bound benzene ring lies over the pyrimidinedione ring, with a weak π–π interaction [centroid–centroid distance = 3.6147 (4) ]. A weak intramolecular C—H...O hydrogen bond generates an S(6) ring motif. In the crystal, molecules are linked into a three-dimensional network by C—H...O hydrogen bonds.
3-Benzyl-7-chloro-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexahydro-1H-pyrrolo[3,4-b]quinoline
K. Chinnakali,D. Sudha,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809045267
Abstract: In the title compound, C31H29ClN2O2S, the pyrrolidine ring adopts an envelope conformation with the methine C atom adjacent to the NH group as the flap atom. The tetrahydropyridine ring has a half-chair conformation. The two rings are trans-fused. The chlorobenzene ring and the adjacent phenyl ring form a dihedral angle of 77.9 (1)°. The benzyl phenyl and the tosyl phenyl rings are oriented at a dihedral angle of 88.0 (1)°. In the crystal, molecules are linked into chains along the a axis by N—H...Cl and C—H...Cl hydrogen bonds and the adjacent chains are cross-linked via C—H...π interactions.
1-Benzyl-6,8-dimethyl-4-phenyl-2-tosyl-1,2,3,3a,4,6,7,8,9,9b-decahydropyrrolo[3,4-c]pyrano[6,5-d]pyrimidine-7,9-dione
K. Chinnakali,D. Sudha,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809044341
Abstract: The molecule of the title compound, C31H31N3O5S, adopts a folded conformation, with the sulfonyl-bound phenyl ring lying over the pyrimidine ring [dihedral angle = 12.04 (6)° and centroid–centroid separation = 3.6986 (8) ]. The pyrrolidine ring adopts a twist conformation, the dihydropyran ring is in a half-chair conformation and the two rings are cis-fused. The tosyl group is attached to the pyrrolidine ring in an equatorial position while the benzyl group is axially attached. The molecular structure is stabilized by weak C—H...O hydrogen bonds and C—H...π interactions. In the crystal, pairs of molecules related by inversion symmetry are linked by C—H...O hydrogen bonds, forming chains propagating along the c axis which are cross-linked into a three-dimensional framework by further C—H...O links.
3-Benzyl-7-bromo-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexahydro-1H-pyrrolo[3,4-b]quinoline
K. Chinnakali,D. Sudha,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809045875
Abstract: In the title compound, C31H29BrN2O2S, the pyrrolidine ring is in a twist conformation and the tetrahydropyridine ring adopts an envelope conformation with the methine C atom adjacent to the NH group as the flap atom; the two rings are trans-fused. The bromobenzene ring and the nearest phenyl ring form a dihedral angle of 82.72 (10)°. The benzyl phenyl and the tosyl phenyl rings are oriented at a dihedral angle of 75.57 (11)°. An intramolecular N—H...π interaction is observed. In the crystal, molecules are linked into chains running along [101] by C—H...O hydrogen bonds and the chains are cross-linked via weak C—H...π interactions.
3-Benzyl-7-methoxy-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexahydro-1H-pyrrolo[3,4-b]quinoline
K. Chinnakali,D. Sudha,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809044973
Abstract: In the title compound, C32H32N2O3S, the pyrrolidine ring adopts an envelope conformation with the methine C atom nearest to the phenyl ring as the flap atom. The tetrahydropyridine ring has a half-chair conformation. The two rings are trans-fused. The phenyl ring bound to the tetrahydropyridine is oriented almost perpendicular [dihedral angle = 86.35 (10)°] to the fused benzene ring. The dihedral angle between the benzylphenyl ring and the sulfonyl-bound phenyl ring is 69.43 (10)°. A very weak N—H...π interaction is observed in the molecular structure. In the crystal, molecules translated one unit along the b axis are linked into C(10) chains by C—H...O hydrogen bonds; adjacent chains are linked via C—H...π interactions, forming a two-dimensional network parallel to the bc plane.
3-Benzyl-7-methyl-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexahydro-1H-pyrrolo[3,4-b]quinoline
K. Chinnakali,D. Sudha,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809044481
Abstract: In the title compound, C32H32N2O2S, the pyrrolidine ring adopts a twist conformation while the tetrahydropyridine ring is in a distorted half-chair conformation. The two rings are trans-fused. The dihedral angle between the sulfonyl and benzyl phenyl rings is 72.54 (14)°. The molecular structure is stabilized by C—H...O hydrogen bonds, and N—H...π interactions involving the benzyl phenyl ring. The screw-related molecules are linked into chains along the b axis by C—H...O hydrogen bonds and C—H...π interactions. Adjacent inversion-related chains interact via C—H...π interactions, forming a two-dimensional network parallel to the bc plane.
1-Ethyl-2-tosyl-4,4,6-trimethyl-2,3,3a,4-tetrahydro-1H-pyrrolo[3,4-c]pyrano[6,5-b]quinoline-11(6H)-one monohydrate
K. Chinnakali,D. Sudha,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809030761
Abstract: In the title compound, C26H30N2O4S·H2O, the pyrrolidine and dihydropyran rings adopt envelope conformations and they are cis-fused. The sulfonyl group has a distorted tetrahedral geometry. In the crystal structure, the molecules are linked into a ribbon-like structure along the a axis by O/C—H...O hydrogen bonds involving water molecules and C—H...π interactions involving the sulfonyl-bound phenyl ring. Adjacent ribbons are cross-linked via C—H...O hydrogen bonds involving a sulfonyl O atom and C—H...π interactions involving the pyridinone ring.
3-Ethyl-9-phenyl-2-tosyl-2,3,3a,4,9,9a-hexahydro-1H-pyrrolo[3,4-b]quinoline
D. Sudha,K. Chinnakali,M. Jayagobi,R. Raghunathan
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808000482
Abstract: In the molecule of the title compound, C26H28N2O2S, the pyrrolidine ring adopts an envelope conformation and the tetrahydropyridine ring is in a half-chair conformation; these two rings are trans-fused. The dihedral angle between the pyridine- and sulfonyl-bound benzene rings is 36.15 (5)°. In the crystalline state, the molecules are linked into a two-dimensional network parallel to the ab plane by C—H...O and C—H...π interactions.
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