Abstract
Silphox [POCl3-n(SiO2)n] efficiently catalyzes the condensation of benzene-1,2-diamine with mono and dicarboxylic acids under microwave irradiation to afford benzimidazole derivatives in high yields and short reaction times.
Acknowledgments
The authors thank Persian Gulf University and Payame Noor University Research Councils for financial support of this work.
Notes
a Isolated yield.
a Isolated yield.
a Isolated yield.
a Isolated yield.
b Our method.