Studies on pyrrolidinones. A convenient synthesis of 2-methyl-5-(5-oxo-1-benzyl-2-pyrrolidinyl)-1,3,4-oxadiazole
作者:Benoǐt Rigo、Daniel Couturier
DOI:10.1002/jhet.5570230152
日期:1986.1
2-Methyl-5-(5-oxo-1-benzyl-2-pyrrolidinyl)-1,3,4-oxadiazole is easily obtained by dehydration of N-acetyl-1-benzylpyroglutamic acid hydrazide with a methanesulfonic acid/phosphoric anhydride mixture.
A New Synthesis Of 1,3,4-Oxadiazoles. Cyclization Of N.N'-Diacylhydrazeves Catalyzed By Palladium(0)
作者:Stephane Lutun、Bruno Hasiak、Daniel Couturier
DOI:10.1080/00397919908085741
日期:1999.1.1
Abstract Several 1,3,4-oxadiazoles were synthetized by cyclization of N,N'-diacylhydrazines catalyzed by palladium(O). Water formed during the reaction is responsible for the hydrolysis of the products. To avoid it, we introduced benzoic anhydride into the medium and obtained an increased yield of oxadiazoles.
Novel procedure for the synthesis of 1,3,4-oxadiazoles from 1,2-diacylhydrazines using polymer-supported Burgess reagent under microwave conditions
作者:Christopher T. Brain、Jane M. Paul、Yvonne Loong、Paul J. Oakley
DOI:10.1016/s0040-4039(99)00382-2
日期:1999.4
A novel and efficient means of effecting the cyclodehydration of 1,2-diacylhydrazines to provide 1,3,4-oxadiazoles is reported. Polymer supported Burgess reagent was utilised in combination with single-mode microwave heating.
Synthesis of 1,3,4-Oxadiazoles Using Polymer-supported Reagents
作者:Christopher T. Brain、Shirley A. Brunton
DOI:10.1055/s-2001-11404
日期:——
The preparation of a novel polystyrene-supported dehydrating agent and its application to the synthesis of 1,3,4-oxadiazoles under thermal and microwave conditions is described. An alternative procedure using tosyl chloride and P-BEMP is also presented.