Synthesis of Triazolyl-Oxadiazolyl-Thiazolyl- and Thiadiazolylbenzofuran of Potential Biological Activity
作者:S. M. S. Atta、N. M. Fawzy、F. A. Ahmed、A. H. Abdel-Rahman
DOI:10.1080/10426500210654
日期:2002.4.1
6-hydroxybenzofuran-5-carbohydrazide were reacted with aryl or alkyl isothiocyanates to give the corresponding thiosemicarbazides ( IIa-h ). Cyclization of the substituted thiosemicarbazides with sodium hydroxide led to the formation of 1,3,4-triazol-2-yl-benzofuran derivatives ( IIIa-d ). Desulfurization of thiosemicarbazide by mercuric oxide gave 1,3,4-oxadiazolyl-benzofuran ( IVa-c ). Treatment of
Condensation of carbohydrazide derivatives Ia, b with dimethylacetylenedicarboxylate and acetylenedicarboxylic acid yielded benzofuran derivatives II a‐d. Reaction of Ib with aromatic aldehydes formed products III a‐d. Treatment of compounds III a‐d with mercaptoacetic acid yielded the cyclocondensation products (IVa‐d). Phthalic anhydride reacted with compounds (Ia, b)to form products (Va, b). It
碳酰肼衍生物 Ia、b 与乙炔二甲酸二甲酯和乙炔二甲酸缩合得到苯并呋喃衍生物 II a-d。Ib 与芳香醛反应形成产物 III a-d。用巯基乙酸处理化合物IIIa-d产生环缩合产物(IVa-d)。邻苯二甲酸酐与化合物(Ia,b)反应形成产物(Va,b)。已经发现,khellin 和 visnagin (VIa, b) 都与芳香醛反应生成亚芳基衍生物 (VIIa-e)。二苯基腈与 2-亚芳基呋喃色酮 VII 衍生物缩合得到环加合物 (VIII a-i)。所选化合物对金黄色葡萄球菌、枯草芽孢杆菌、大肠杆菌、假单胞菌、沙门氏菌和欧文氏菌的抗菌活性进行了测试,结果良好。
HISHMAT, O. H.;MABROUK, S. S.;NASSEF, A. M. M.;SHAYEB, N. M. A.;ISMAIL, S+, EGYPT. J. PHARM. SCI., 30,(1989) N-4, C. 133-143
作者:HISHMAT, O. H.、MABROUK, S. S.、NASSEF, A. M. M.、SHAYEB, N. M. A.、ISMAIL, S+
DOI:——
日期:——
El-Hamouly, W. S.; Zeid, I. F.; Abdalla, Shadia M., Egyptian Journal of Chemistry, 1999, vol. 42, # 6, p. 599 - 607
作者:El-Hamouly, W. S.、Zeid, I. F.、Abdalla, Shadia M.、Abbas, Eman M.