Journal
TETRAHEDRON LETTERS
Volume 49, Issue 5, Pages 879-883Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2007.11.165
Keywords
1,3,4-oxadiazole; 1,3,4-thiadiazole; nafion; P4S10/Al2O3; solvent-free reaction; microwave irradiation
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A novel one-pot solvent-free synthesis of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles by condensation of acid hydrazide and triethyl orthoalkanates under microwave irradiations is reported. This green protocol was catalyzed efficiently by solid supported Nafion(R)NR50 and phosphorus pentasulfide in alumina (P4S10/Al2O3) with excellent yields. (C) 2007 Elsevier Ltd. All rights reserved.
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