Dicyanomethylene compounds and heterocyclization of acylthiosemicarbazides
作者:Alaa A. Hassan、Aboul‐Fetouh E. Mourad、Ashraf H. Abou‐Zeid
DOI:10.1002/jhet.5570450205
日期:2008.3
solution) act on substituted acylthiosemicarbazides 4a-d, forming the derivatives of oxoindeno-pyrrolylidenehydrazide (5a-d and 7a-d), thiazoloindolylidenehydrazide (12a-d), pyrroloindolylidene-hydrazide (13a-d) and spiro[pyrrolylidene-4,1′(cyclohexa-2′,5′-dienylidene)]propanedinitrile (18a-d). Rationales for these conversiones involving the nucleophilic addition on dicyanomethylene carbon atom are presented
Synthesis of [1,2,4]triazolo[3,4-<i>b</i>][1,3]thiazine-5-carboxylates<i>via</i>one-pot reaction of<i>N</i>-substituted-hydrazino-carbothioamides with diethyl maleate
作者:Ashraf A. Aly、Alaa A. Hassan、Yusria R. Ibrahim、Mohamed Abdel-Aziz
DOI:10.1002/jhet.173
日期:2009.7
Diethylmaleate reacts with N-substituted-hydrazino-carbothioamides to form ethyl [1,2,4]triazolo[3,4-b][1,3]thiazine-5-carboxylates. Reaction proceeds via bicyclization and oxidation processes. J. Heterocyclic Chem. (2009).
马来酸二乙酯与N-取代的肼基-碳硫代酰胺反应形成[1,2,4]三唑并[3,4- b ] [1,3]噻嗪-5-羧酸乙酯。反应通过双环化和氧化过程进行。J.杂环化学。(2009)。