Abstract
Arylazothiocarbamoyl derivatives 4a–e were utilized for the synthesis of several new thiophene and pyrazole derivatives. Compound 4 reacted with phenacyl bromide, ethyl bromoacetate, chloroacetonitrile, chloroacetone and hydrazine hydrate to yield thiophene and pyrazole derivatives 7, 10, 12, 14, and 16, respectively.