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Efficient oxidative cyclisation of acid hydrazides to 2, 5-disubstituted 1, 3, 4-oxadiazoles catalysed by Bu4NI with t-BuOOH as oxidant. (1st August 2013)
Record Type:
Journal Article
Title:
Efficient oxidative cyclisation of acid hydrazides to 2, 5-disubstituted 1, 3, 4-oxadiazoles catalysed by Bu4NI with t-BuOOH as oxidant. (1st August 2013)
Main Title:
Efficient oxidative cyclisation of acid hydrazides to 2, 5-disubstituted 1, 3, 4-oxadiazoles catalysed by Bu4NI with t-BuOOH as oxidant
Acid hydrazides or araldehyde N-acylhydrazones can be converted in good yields to, respectively, symmetrical or unsymmetrical, 2, 5-disubstituted 1, 3, 4-oxadiazoles at 60 °C by a Bu4NI-catalysed procedure which requires the presence of a base and 2.5 equiv. of t-butyl hydroperoxide.