Substituted hydroxycarbohydrazides

Tolylhydrazides of α-thienylglyoxylic acid are reacted with Grignard reagents, to give a series of hitherto undescribed tolylhydrazides of α-aryl-α-(2-thienyl)- and α-butyl-α-(2-thienyl)glycolic acid and their benzoyl derivatives. UV spectra data of the tolylhydrazides given are synthesized. A study is made of the IR spectra of a number of arylhydrazides of α-phenyl-α-(2-thienyl)glycolic acid. For part XXXIV see [1].