Syntheses of [1, 2, 3] selenadiazolo [4, 5??e] benzofuran or benzothiophene,[1, 2, 3] thiadiazolo [4, 5??e] benzofuran or benzothiophene, and 2??benzofuranyl??1, 3, 4?? …

…, F Ellahiyan, T Akbarzadeh, A Shafiee

文献索引：Shekarchi; Ellahiyan; Akbarzadeh; Shafiee Journal of Heterocyclic Chemistry, 2003 , vol. 40, # 3 p. 427 - 433

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被引用次数: 8

摘要

Abstract Dehydrogenation of ethyl 3-methyl-4-oxo-4, 5, 6, 7-tetrahydrobenzofuran-2- carboxylate 1 with 2, 2′-azobi-sisobutyronitrile and N-bromosuccinimide gave ethyl 4- hydroxy-3-methylbenzofuran-2-carboxylate 3. Reaction of compounds 3–4 with hydrazine hydrate afforded the corresponding hydrazides 5a-b. The reaction of 5a-b with aldehydes yielded substituted hydrazones 6a-l. Compounds 7a-d were prepared from compounds 6a ...