Tungstate sulfuric acid: preparation, characterization, and application in catalytic synthesis of novel benzimidazoles

✍ Scribed by Karami, Bahador; Khodabakhshi, Saeed; Haghighijou, Zahra

• Book ID: 115063871
• Publisher: Versita
• Year: 2012
• Tongue: English
• Weight: 222 KB
• Volume: 66
• Category: Article
• ISSN: 0366-6352
• DOI: 10.2478/s11696-012-0152-4

✦ Synopsis

Abstract

Tungstate sulfuric acid (TSA) was prepared, characterized, and applied for direct synthesis of novel and known benzimidazoles through a condensation reaction of o-phenylenediamines with orthoesters under solvent-free conditions. TSA was characterized by powdered X-ray diffraction (XRD), X-ray fluorescence (XRF), and FTIR spectroscopy. This novel and eco-friendly method is very cheap and has many advantages such as excellent yields, recyclable and eco-friendly catalyst, and simple work-up procedure.