5-氨基-3-苯基吡唑(I)和5-氨基-4-溴-3-苯基吡唑(II)与乙酰乙酸乙酯和乙酰丙酮反应,生成各种吡唑并[1,5 - a ]嘧啶IV-VI和苯偶姻给出不同的稠合吡唑,即咪唑并[1,2- b ]吡唑IX,吡咯并[2,3- c ]吡唑X和吡唑并[4,3- b ] [1,4]恶嗪XII。重氮化的II与活性的含亚甲基的腈偶联,得到吡唑并[5,1- c ]-,作为-三嗪XIV。
5-氨基-3-苯基吡唑(I)和5-氨基-4-溴-3-苯基吡唑(II)与乙酰乙酸乙酯和乙酰丙酮反应,生成各种吡唑并[1,5 - a ]嘧啶IV-VI和苯偶姻给出不同的稠合吡唑,即咪唑并[1,2- b ]吡唑IX,吡咯并[2,3- c ]吡唑X和吡唑并[4,3- b ] [1,4]恶嗪XII。重氮化的II与活性的含亚甲基的腈偶联,得到吡唑并[5,1- c ]-,作为-三嗪XIV。
Reactions with hydrazidoyl halides.<b>IV</b>. Synthesis of thiazolo[3,2-<i>a</i>]benzimidazoles, imidazo[2,1-6]thiazoles and pyrazolo[4,3-<i>b</i>]thiazines
作者:Abdou O. Abdelhamid、Fawzy A. Attaby
DOI:10.1002/jhet.5570280107
日期:1991.1
Hydrazidoyl halides were condensed with 2-mercaptobenzimidazole yielding 4a-c and 7a,b which were cyclized to the corresponding 2-arylhydrazonothiazolo[3,2-a]benzimidazol-3-ones 5a,b and 3-substituted 2-arylazo thiazolo[3,2-a]benzimidazoles 8a,b respectively. Imidazo[2,1-b]thiazoles were obtained by the reaction of hydrazidoyl halides with 2-mercapto-4,5-dihydroimidazole. Also, hydrazidoyl halides
将酰肼基卤化物与2-巯基苯并咪唑缩合,得到4a-c和7a,b,将其环化为相应的2-芳基肼基没杂唑[ 3,2 - a ]苯并咪唑-3-酮5a,b和3-取代的2-芳基偶氮噻唑[3 ,2- a ]苯并咪唑分别为8a,b。通过酰肼基卤化物与2-巯基-4,5-二氢咪唑的反应获得咪唑并[ 2,1- b ]噻唑。另外,使酰肼基卤化物6a,b与3-氨基-4-巯基-5-苯基吡唑反应,得到吡唑并[4,3- b ]噻嗪15a,b。。根据产品的元素分析和光谱数据确定产品的结构。
Pyrimidine Derivatives and Related Compounds, XI: Synthesis of some new Mercaptopyrazolo[1,5-a]pyrimidines and Mercaptopyrazolo[1,5-c]-as-triazines
作者:Mohamed R. H. Elmoghayar、Mohamed K. A. Ibrahim、Ibrahim El-Sakka、Ahmed H. H. Elghandour、Mohamed H. Elnagdi
DOI:10.1002/ardp.19833160810
日期:——
Several new substituted pyrazolo[1,5‐c]‐as‐triazines and pyrazolo[1,5‐a]pyrimidines were synthesised using 5‐amino‐4‐mercapto‐3‐phenylpyrazole and 5‐amino‐4‐bromo‐3‐phenylpyrazole as starting materials.