1-Acylthiosemicarbazides, 1,2,4-triazole-5(4H)-thiones, 1,3,4-thiadiazoles and hydrazones containing 5-methyl-2-benzoxazolinones: Synthesis, analgesic-anti-inflammatory and antimicrobial activities
作者:Umut Salgın-Gökşen、Nesrin Gökhan-Kelekçi、Özgür Göktaş、Yavuz Köysal、Ekrem Kılıç、Şamil Işık、Göknur Aktay、Meral Özalp
DOI:10.1016/j.bmc.2007.06.006
日期:2007.9.1
5-methyl-2-benzoxazolinone (4) was synthesized by the condensation of 2-(5-methyl-2-benzoxazolinone-3-yl)acetate with hydrazine hydrate. Thiosemicarbazide derivatives (5a-5d) were afforded by the reaction of corresponding compound 4 with substituted isothiocyanates. The cyclization of compounds 5a-5d in the presence of triethylamine resulted in the formation of compounds 6a-6d containing 1,2,4-triazole
通过将2-(5-甲基-2-苯并恶唑啉酮-3-基)乙酸盐与水合肼缩合,合成含有5-甲基-2-苯并恶唑啉酮(4)的乙酸酰肼。通过相应的化合物4与取代的异硫氰酸酯的反应得到硫代氨基脲衍生物(5a-5d)。在三乙胺存在下化合物5a-5d的环化导致形成含有1,2,4-三唑环的化合物6a-6d。另一方面,用正磷酸处理化合物5a-5d导致化合物5a-5d的侧链转变成1,3,4-噻二唑环:因此,获得化合物7a-7c。用芳族醛处理化合物4导致形成亚芳基酰肼作为顺-反式构象异构体(8a-8e)。通过光谱和元素分析阐明了化合物的结构。尽管大多数化合物在镇痛抗炎领域表现出高活性,但发现其中大多数对细菌和真菌没有活性。