Chemistry of iminofurans: XI. Synthesis, structure, and cyclization of 4-substituted 2-(aroylhydrazinylidene)-4-oxobutanoic acids


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详细

Aromatic hydrazides reacted with 4-aryl-2-hydroxy-4-oxobut-2-enoic and 2-hydroxy-5,5-dimethyl- 4-oxohex-2-enoic acids to give 4-aryl-2-(2-aroylhydrazinylidene)-4-oxobutanoic and 5,5-dimethyl-2-(aroylhydrazinylidene)- 4-oxohexanoic acids. The products were found to exist in solution as mixtures of Z/E-hydrazinylidene and cyclic dihydropyrazole tautomers, and they underwent intramolecular cyclization to 5-aryland 5-tert-butyl-3-(aroylhydrazinylidene)furan-2(3H)-ones by the action of acetic anhydride.

作者简介

N. Igidov

Perm State Pharmaceutical Academy

Email: rubtsov@psu.ru
俄罗斯联邦, ul. Polevaya 2, Perm, 614990

M. Kiselev

Perm State Pharmaceutical Academy

Email: rubtsov@psu.ru
俄罗斯联邦, ul. Polevaya 2, Perm, 614990

A. Rubtsov

Perm State National Research University

编辑信件的主要联系方式.
Email: rubtsov@psu.ru
俄罗斯联邦, ul. Bukireva 15, Perm, 614990

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