Reaction of 1-acylthiosemicarbazides with ethenetetracarbonitrile
作者:Alaa A. Hassan、Aboul-Fetouh E. Mourad、Ashraf H. Abou-Zied
DOI:10.1002/jhet.5570440532
日期:2007.9
1-Acylthiosemicarbazides 9a-d reacted with ethenetetracarbonitrile (TCNE, 2) in ethyl acetate with formation of N′-(4-amino-5,6-dicyano-2H-1,3-thiazin-2-ylidene) substituted hydrazide 10a-d, N′-(5-amino-3,4-dicyano-2H-pyrrol-2-ylidene)-2-substituted hydrazide 11a-d and 2-substituted imidazo[2,1-b][1,3,4]-oxadiazole-5,6-dicarbonitrile 12a-d. Rationales for the conversions observed are presented.
1-酰基硫代氨基脲9a-d与乙四腈(TCNE,2)在乙酸乙酯中反应,形成N '-(4-氨基-5,6-二氰基-2 H -1,3-噻嗪-2-亚烷基)取代的酰肼10a -d,N '-(5-氨基-3,4-二氰基-2 H-吡咯-2-亚烷基)-2-取代的酰肼11a-d和2-取代的咪唑并[2,1- b ] [1,3 ,4]-恶二唑-5,6-二腈12a-d。提供了观察到的转换的理由。
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)。
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 1,3-thiazin-2-ylidene-substituted hydrazides via reaction of N-substituted-hydrazino-carbothioamides with 1,4-diphenylbut-2-yne-1,4-dione
作者:Ashraf A. Aly、Alaa A. Hassan、Yusria R. Ibrahim
DOI:10.3184/030823408x384575
日期:2008.12
1,4-Diphenylbut-2-yne-1,4-dione reacts with N-substituted-hydrazino-carbothioamides to form the corresponding N’-6-benzoyl-4-phenyl-2H-1,3-thiazin-2-ylidene]-substituted-hydrazides.