A new series of isoxazole derivatives were synthesized by synthesizing various chalcone derivatives and cyclizing them to give resultant isoxazole derivatives (TPI1TPI20).. All the synthesized derivatives were characterized with FTIR and NMR spectral analysis and evaluated for their anti-inflammatory activity in vivo (carrageenan induced paw ooedema method in rats). The isoxazole derivatives TP...

In the title compound, C11H9NO3, the phenyl and isoxazole rings form a dihedral angle of 56.64 (8)°. The carb-oxy group is almost in the same plane as the isoxazole ring with a C-C-C-O torsion angle of -3.3 (2)°. In the crystal, pairs of O-H⋯O hydrogen bonds link the mol-ecules into head-to-head dimers. C-H⋯N hydrogen bonds and π-π stacking inter-actions between phenyl rings [centroid-centroid ...

In the title compound C(11)H(9)NO(2), the phenyl and isoxazole rings are almost coplanar, making a dihedral angle of 1.14 (9)°. This planarity is also assisted by an intra-molecular C-H⋯O hydrogen bond between the phenyl ring and the carbonyl O atom. In the crystal, weak C-H⋯O inter-actions generate a layered structure parallel to the ac plane.

In the crystal structure of the title compound, C(14)H(10)FN(3)O, the plane of the isoxazole ring makes dihedral angles of 35.72 (9) and 30.00 (9)°, respectively, with those of the 4-fluoro-phenyl and pyridine rings. The plane of the 4-fluoro-phenyl ring makes a dihedral angle of 45.85 (8)° with that of the pyridine ring. The crystal structure is stabilized by inter-molecular N-H⋯N hydrogen bon...

The title compound, C(18)H(16)N(4)O, is built up from fused six- and five-membered rings linked to a five-membered isoxazole ring and to a six-membered pyridine ring through a CH(2) group. The fused-ring system is essentially planar, with a maximum deviation of 0.019 (1) Å. It forms inter-planar angles of 70.03 (7)° with the isoxazole ring and 81.68 (7)° with the pyridine ring; the two latter r...

In the mol-ecule of the title compound, C(17)H(16)N(2)O(3)S, the phenyl ring is oriented with respect to the thio-phene and succinimide rings at dihedral angles of 88.08 (3) and 57.81 (3)°, respectively; the dihedral angle between the thio-phene and succinimide rings is 35.69 (3)°. The isoxazole ring adopts an envelope conformation with the N atom at the flap position. In the crystal structure,...

In the title compound, C25H20N2O2S, the di-hydro-isoxazole ring exhibits an envelope conformation with the methine atom being the flap, while the 1,4-thia-zine ring displays a screw-boat conformation. The six-membered ring fused to the 1,4-thia-zine ring makes dihedral angles of 63.04 (2) and 54.7 (2)° with the mean planes through the five-membered heterocycle and the attached phenyl ring, resp...

The dipolar cycloadditions of ortho-nitrophenyl alkynes with aryl nitrile oxides has been demonstrated. A range of substituents are tolerated on the alkyne. These reactions proceed with excellent levels of regioselectivity. Subsequent functionalization of the isoxazole scaffold has been demonstrated.