In the title compound, C(16)H(11)BrO(2), the isocoumarin ring system is planar (r.m.s. deviation = 0.015 Å) and subtends a dihedral angle of 88.90 (2)° with the bromo-benzene ring. In the crystal, mol-ecules are linked, forming a three-dimensional packing pattern involving C-H⋯O inter-actions, Br⋯O contacts [3.4734 (10) Å] and π-π stacking inter-actions with centroid-centroid distances ranging ...

The asymmetric unit of the title compound, C(16)H(11)ClO(2), a chemically synthesized isocoumarin, contains three independent mol-ecules. The benzopyran and benzene rings are approximately perpendicular to each other, forming dihedral angles ranging from 83.08 (14) to 87.43 (11)°. In the crystal structure, mol-ecules are linked by inter-molecular C-H⋯O hydrogen-bonding inter-actions, forming ch...

The asymmetric unit of the title compound, C(16)H(11)FO(2), contains two independent mol-ecules. The isochromene ring systems are planar and are oriented with respect to the fluoro-benzene rings at dihedral angles of 87.15 (3) and 87.85 (3)° in the two mol-ecules.

Nano TiO2 supported on SiO2 (Nano TiO2@SiO2) as a solid Lewis acid, was described to be an effective and reusable catalyst for one-pot three-component reaction of benzil, aryl aldehydes and ammonium acetate for the synthesis 2-aryl-4,5-diphenyl-1H-imdazoles synthesis. To explore the high efficacy of the catalytic system the four-component cyclization of benzil, aryl aldehydes, ammonium acetate ...

Two series of 2-thioxoimidazo[4,5-b]pyridine derivatives have been synthesized from 2,3-diaminopyridine (1) and 5-halogenosubstituted-2,3-diaminopyridines 2, 3. Mannich bases 7 - 12 and 24 - 29, derivatives of 1-arylamino-6-halogeno-2-thioxoimidazo[4,5-b]pyridine were obtained with selected secondary amines: morpholine, piperidine, 2-methoxyphenylpiperazine, pyrimidyn-2-yl-piperazine and formal...

Nano TiO2 supported on SiO2 (Nano TiO2@SiO2) as a solid Lewis acid, was described to be an effective and reusable catalyst for one-pot three-component reaction of benzil, aryl aldehydes and ammonium acetate for the synthesis 2-aryl-4,5-diphenyl-1H-imdazoles synthesis. To explore the high efficacy of the catalytic system the four-component cyclization of benzil, aryl aldehydes, ammonium acetate ...

The enantioselective addition of anilines to azoalkenes was accomplished through the use of a chiral phosphoric acid catalyst. The resulting α-arylamino hydrazones were obtained in good yields and excellent enantioselectivities and provide access to enantioenriched α-arylamino ketones. A serendipitous kinetic resolution of racemic α-arylamino hydrazones is also described.