Reactions of Pivaloylpyrotartaric Acids with Acylhydrazines in the Synthesis of Pyrazolincarboxylic Acids.

Abstract

In solution, the acylhydrazines (III) form a pyrazoline tautomer. -(KOZMINYKH, V. O.; GONCHAROV, V. I.; KOZMINYKH, E. N.; OBORIN, D. B.; Chem. Heterocycl. Compd. (N. Y.) 42 (2006) 5, 698-700; Perm' State Pedagog. Univ., Perm' 614990, Russia; Eng.) -C. Oppel