A Heterogeneous catalyst for efficient and green synthesis of 2-arylbenzothiazoles and 2-arylbenzimidazoles

• Published in: Applied catalysis. A, General General, 2009-01, Vol.353 (1), p.74-79
• Main Authors: Fazaeli, Razieh, Aliyan, Hamid
• Format: Article
• Language: English
• Subjects: 2-Arylbenzimidazoles; 2-Arylbenzothiazoles; Catalysis; Chemistry; Exact sciences and technology; General and physical chemistry; Heterogeneous; Heteropoly acids (HPAs); o-Aminothiophenols; o-Phenylenediamine (OPD); Polyoxometalates (POMs); Supported catalyst; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2008.10.035

Solid heteropoly acid supported on silica gel (Cu 3/2PMo 12O 40/SiO 2) is easily used as a heterogonous, reusable and efficient catalyst for synthesis of 2-arylbenzimidazoles and 2-arylbenzothiazoles by reaction of o-phenylenediamine and o-aminothiophenol with different aldehydes under various conditions. The catalyst can be reused for several times but it will be less active. ▪ Solid heteropoly acid supported on silica gel (Cu 3/2PMo 12O 40/SiO 2) is easily used as a heterogonous, reusable and efficient catalyst for synthesis of 2-arylbenzimidazoles and 2-arylbenzothiazoles by reaction of o-phenylenediamine and o-aminothiophenol with different aldehydes under various conditions (in solvent, under solvent-free conditions, microwave and ultrasonic wave irradiation). The catalyst can be reused for several times but it will be less active.