Journal
MONATSHEFTE FUR CHEMIE
Volume 138, Issue 12, Pages 1253-1255Publisher
SPRINGER WIEN
DOI: 10.1007/s00706-007-0724-0
Keywords
heterocycle; oxadiazole; solvent-free; alum
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Alum (KAl(SO4)(2) center dot 12H(2)O) catalyzed the efficient synthesis of mono- and disubstituted 1,3,4-oxadiazoles by the condensation of acyl hydrazides with orthoesters under solvent-free conditions at 100 degrees C. This methodology offers significant improvements for the synthesis of oxadiazoles with regard to the yield of products, simplicity in operation, inexpensive reagents, and green aspects by avoiding toxic catalysts and solvents.
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