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Item Catena-Poly[[(ethanol-O)[3-(1-phenyl-1H-pyrazol-3-yl)benzoic acid-O]lithium] - 3-(1-phenyl-1H-pyrazol-3-yl)benzoato-2 O:O?](2009) Fun, H.-K.; Balasubramani, K.; Rai, S.; Shetty, P.; Isloor, A.M.The asymmetric unit of the title polymeric compound, [Li2(C 16H11N2O2)2(C 16H12N2O2)2(CH 3CH2OH)2] n , contains two Li I ions, two 3-(1-phenyl-1H-pyrazol-3-yl)benzoate ions, two 3-(1-phenyl-1H-pyrazol-3-yl)benzoic acid molecules and two ethanol molecules. In the crystal structure, each of the two LiI ions has a distorted tetra-hedral geometry, coordinated by two carboxyl-ate O atoms, one carboxyl O atom and one ethanol O atom. The carboxyl-ate group bridges the LiI ions, forming a one-dimensional polymeric chain along [100]. The crystal structure is further stabilized by O - H?O and C - H?N hydrogen bonding, and ?-? inter-actions with centroid-centroid distances in the range 3.6534 (13)-3.8374 (13) Å. © 2009 Fun et al.Item Microbial transformation of bioactive natural products(2010) Gopkumar, P.; Mugeraya, G.In the present study, the fungal biotransformation of 1, 2, 3, 9-tetra hydrpyrrolo [2, 1-b] quinazolin-3-ol (I) is presented. Biocatalysis, isolation and subsequent structure elucidation of the newly transformed metabolite (-)-3-hydroxy -2, 3-dihydro pyrrolo [2, 1-b] quinazoline-9(1H)-one (II) is presented. Microbial transformation of Vasicine (I) by Aspergillus niger, Rhizopus arrhizus, Pencillium notatum and Trematus versicolor afforded (-)-3-hydroxy -2, 3-dihydro pyrrolo [2, 1-b] quinazoline-9(1H)-one (II) (100%) as the sole metabolic product. 1, 2, 3, 9-tetra hydrpyrrolo [2, 1-b] quinazolin-3-ol (I) and (-)-3-hydroxy -2, 3-dihydro pyrrolo [2, 1-b] quinazoline-9(1H)-one (II) screened for antibacterial and antifungal activity.Item 2-(Biphenyl-4-yl)-5-[3-(4,5,6,7-tetra-hydrothieno[3,2-c] pyridine-5-ylsulfonyl)thiophen-2-yl]-1,3,4-oxadiazole(2011) Fun, H.-K.; Hemamalini, M.; Rai, S.; Isloor, A.M.; Shetty, P.In the title mol-ecule, C 25H 19N 3O 3S 3, the tetra-hydro-pyridine ring adopts a half-chair conformation. The dihedral angle between the least-squares plane through the tetra-hydro-pyridine ring and two thio-phene and two benzene rings are 6.25 (9), 89.49 (9), 76.43 (9) and 84.93 (8)°, respectively, while the dihedral angle between the 1,3,4-oxadiazole and tetrahydro-pyridine rings is 81.14 (9)°. In the crystal, adjacent mol-ecules are connected via weak C-H?N hydrogen bonds, forming a chain along the b axis.Item 2-(5-Bromopyridin-3-yl)-5-[3-(4,5,6,7-tetrahydrothieno[3,2-c] pyridine-5-ylsulfon-yl)thio-phen-2-yl]-1,3,4-oxa-diazole(2011) Fun, H.-K.; Hemamalini, M.; Rai, S.; Isloor, A.M.; Shetty, P.In the title compound, C 18H 13BrN 4O 3S 3, the tetra-hydro-pyridine ring adopts a half-chair conformation with the central methylene-C atom of the NCH 2CH 2 unit at the flap. The dihedral angles between the tetra-hydro-pyridine ring and the pyridine and two thiophene rings are 69.34 (13) 5.66 (13) and 68.63 (13)°, respectively, while the dihedral angle between the 1,3,4-oxadiazole and tetrahydropyridine rings is 54.76 (13)°. The molecule is stabilized by an intramolecular C-H?N interaction. In the crystal, adjacent molecules are connected via bifurcated C-H?(N,O) hydrogen bonds, forming a chain along the b axis.Item 4-[3-(Biphenyl-4-yl)-1-phenyl-4,5-di-hydro-1H-pyrazol-5-yl] -3-(4-meth-oxy-phen-yl)-1-phenyl-1H-pyrazole dioxane monosolvate(2012) Fun, H.-K.; Arshad, S.; Malladi, S.; Isloor, A.M.; Shivananda, K.N.In the title compound, C37H30N4O· C4H8O2, the dihedral angle between the pyrazole and dihydro-pyrazole rings is 74.09 (10)°. In the crystal, the components are linked into centrosymmetric tetra-mers (two main mol-ecules and two solvent mol-ecules) by C-H?O hydrogen bonds. C-H?? and ?-? [shortest centroid-centroid separation = 3.6546 (9) Å] inter-actions are also observed.