Reactions of unsaturated tetra- and tri-esters with hydrazine hydrate and semicarbazide hydrochloride
作者:H. N. Al-Jallo、A. Al-Khashab、I. G. Sallomi
DOI:10.1039/p19720001022
日期:——
intermediates in the reactionbetween 3-substituted tetraethyl propene-1,1,3,3-tetracarboxylates (I) and hydrazine hydrate. No such intermediates were obtained in the reactionbetween 3-substituted triethyl propene-1,1,3-tricarboxylates (VI) and with hydrazine hydrate, which gave ethyl 5-oxo-Δ2-pyrazoline-4-carboxylate (III) and the appropriate saturated esters (VII). Semicarbazide hydrochloride reacted similarly