Synthesis and application of silica phenyl sulfonic acid as a solid acid heterogeneous catalyst for one-pot synthesis of 2-aryl-1-arylmethyl-1H-1,3-benzimidazoles and bis(indolyl)methanes in water
作者:Hojat Veisi、Alireza Sedrpoushan、Mohammad Ali Zolfigol、Farajollah Mohanazadeh
DOI:10.1002/jhet.765
日期:2011.11
Silica phenyl sulfonicacid (SPSA) was prepared and effectively used in the one‐pot synthesis of 2‐aryl‐1‐arylmethyl‐1H‐1,3‐benzimidazoles from o‐phenylenediamine with aldehydes in water in the presence of tetrabutyl ammonium bromide with good to high yield. Also, SPSA was used as a catalyst for the synthesis of bis(indolyl)methanes in water. J. Heterocyclic Chem., (2011).
Facile Synthesis of Bis(indolyl)methanes Using LaCl<sub>3</sub>· 7H<sub>2</sub>O as a Mild and Efficient Catalyst in Molten Salt Media
作者:Neda Seyedi、Kazem Saidi、Hojatollah Khabazzadeh
DOI:10.1080/00397910802604224
日期:2009.4.22
Abstract Efficient electrophilic substitution reaction of indole with various carbonyl compounds were carried out using a catalytic amount of LaCl3 · 7H2O in molten tetraethylammonium chloride as an ionic liquid to afford the corresponding bis(indolyl)methanes in excellent yields.