Abstract
Silica-supported LiHSO4 (LiHSO4/SiO2) is used as a green, cheap, and efficient catalytic system for the synthesis of bis(indolyl)methanes via the condensation of indoles with carbonyl compounds under solvent-free conditions. The reactions proceed rapidly at room temperature, and the title compounds are obtained in high to excellent yields.
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.