Routes to 3-aryl-5-phenyl-2-thioacylmethylene-2H-1,3,4-thiadiazolenes

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Abstract
Prospective routes to the above compounds include reaction of an N′-arylbenzothiohydrazide or of its N′-acetyl derivative with thioacetic acid, when the thioacyl and acyl derivatives are formed, as well as by reaction of the 2-acylmethylene-3-aryl-5-phenyl-2H-1,3,4-thiadiazolenes with phosphorus pentasulphide. The 1H n.m.r. and mass spectra of these compounds are discussed.