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 reaction between 3-substituted tetraethyl propene-1,1,3,3-tetracarboxylates (I) and hydrazine hydrate. No such intermediates were obtained in the reaction between 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
已分离出各种4,5-二取代的吡唑烷基-3-酮(IIc-f)作为3-取代的四乙基丙烯-1,1,3,3-四羧酸酯(I)与水合肼之间反应的中间体。在反应的3-取代的三乙基丙烯-1,1,3-三羧酸盐(VI)之间,并用水合肼,这给乙基-5-氧代Δ没有获得这样的中间体2 -吡唑啉-4-羧酸叔丁酯(III)和适当的饱和酯(VII)。氨基脲盐酸盐与各种酯类似地反应,得到与水合肼相同的最终产物。