4,5-Dihydro-7H-pyrano[3,4-c]isoxazoles (II and III) with an o-chlorophenyl or p-chlorophenyl group at C-7 were synthesized and the effect of substitution at C-3 of II and III on fungicidal activity was investigated in vivo. When the substituent at C-3 of II and III was CH2Br, CH=NOMe, CH=NOEt or CH=NO-allyl, the fungicidal effect was significant and selectively high on wheat leaf rust and barle...

Advances of modern medicine require constant supply of new drugs displaying specific therapeutic actions. Bio-accessibility and lack of side-effects are highly desired features of new therapeutics. Modifications of the isoxazole structure offer a possibility of generating potential drugs exhibiting a wide array of biological activities, as described by us during the last decade (1-10). A majori...

In the title compound, C(11)H(8)F(2)N(2)O(2)·0.5H(2)O, the dihedral angle between the benzene and isoxazole rings is 8.08 (3)°. In the crystal, the components are linked by O-H⋯N and N-H⋯O hydrogen bonds, in which the water mol-ecule acts as both a donor and an acceptor, into a tape with an R(4) (4)(16) graph-set motif along the a axis. The water mol-ecule is located on a twofold rotation axis....

In the title compound, C(10)H(9)NO(2), the isoxazole and phenyl rings form a dihedral angle of 25.82 (3)°. In the crystal, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into ribbons propagating along [001]. The crystal packing is further stabilized by weak C-H⋯O and C-H⋯N inter-actions.

In the title compound, C(10)H(13)NO(2)S, the thio-phene and isoxazoline rings are almost coplanar, the dihedral angle between their least-squares planes being 2.08 (1)°. The O-H atoms of the methyl hy-droxy group and the N atom of the isoxazole ring are orientated in the same direction to allow for the formation of inter-molecular O-H⋯N hydrogen bonds that lead to a supra-molecular chain along ...

In the title compound, C(8)H(7)N(3)O, there are two independent mol-ecules in the asymmetric unit, in which the angles between the pyridine ring and the isoxazole ring are 35.8 (6) and 10.6 (2)°. The crystal packing is stabilized by N-H⋯N hydrogen bonds, which result in the mol-ecules forming a two-dimensional supra-molecular layer.

Molecules containing polarized NH fragments that behave as anion-binding motifs are widely used as receptors for recognition and sensing purposes in aprotic solvents. We present here a new example of a receptor, 3-amino-5-(4,5,6,7-tetrahydro-1H-indol-2-yl)isoxazole-4-carboxamide (receptor 1), which contains pyrrole, amide and amino subunits. This receptor shows both changes in its UV-vis absorp...

In the title compound, C(18)H(14)N(2)O(2), the pyran ring of the chromeno ring system has a half-chair conformation, and the dihedral angle between its mean plane and the benzene ring is 5.3 (2)°. The isoxazole ring forms a dihedral angle of 74.6 (2)° with the attached benzene ring and is inclined to the mean plane of the chromeno ring system by 15.06 (19)°. In the crystal, there are no signifi...

In the title compound, C(38)H(31)ClN(2)O(4), the isoxazole ring adopts an envelope conformation with the N atom as the flap. The crystal packing is stabilized by C-H⋯O hydrogen bonds, forming chains running along the c-axis direction.