Tungstate sulfuric acid: preparation, ch
β
Karami, Bahador; Khodabakhshi, Saeed; Haghighijou, Zahra
π
Article
π
2012
π
Versita
π
English
β 222 KB
## 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),