Based on bioisosteric similarities with isoniazid, a series of 1, 2, 3, 4-tetrahydropyrimidine-5- carbonitrile derivatives has been designed. The target compounds have been synthesized by multicomponent reaction which involves one-pot organic reactions using ethylcyanoacetate, urea/thiourea and arylaldehydes in presence of ethanolic K2CO3. Two methodologies, conventional and microwave-assisted, have been adopted for the ...