title: Synthesis, characterization and application of various types of alumina and nano-γ-alumina sulfuric acid for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles.
abstract: An efficient and green protocol for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles by one-pot reaction of different aromatic carboxylic acids and benzoyl hydrazides using natural alumina, alumina sulfuric acid (ASA), nano-γ-alumina and nano-γ-alumina sulfuric acid (nano-γ-ASA) under microwave irradiation and solvent-free conditions was developed. Short reaction times, mild reaction conditions, easy work-up, and high yields are the main advantages of this methodology. The catalysts could be recovered and reused for the subsequent reactions without any appreciable loss of efficiency.
authors.forename: Abbas
authors.initials: A
authors.lastname: Teimouri
authors.forename: Hossien
authors.initials: H
authors.lastname: Salavati
authors.forename: Alireza Najafi
authors.initials: AN
authors.lastname: Chermahini