This article describes simple, fast and convenient syntheses of six novel 4-thiazolidinone derivatives (3a-f) containing benzofuran, quinoline and pyrazole moieties. In the first step, six separate carbohydrazides (2a-f) were synthesised with 5-(benzofuran-2-yl)-1-phenyl-1H-pyrazole-3-carbohydrazide…