Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, Iran
Department of Chemistry, College of Science, University of Kashan, Kashan, Iran.
BF3/nano-sawdust as a green, inexpensive, natural, biodegradable and readily available biopolymer solid acid catalyst was synthesized and characterized. This catalystwas used successfully for the synthesis of various tri-substituted imidazoles in high yields under solvent free conditions.