Synthesis of some new benzofuran-based thiophene, 1,3-oxathiole and 1,3,4-oxa(thia)diazole derivatives
作者:Kamal M. Dawood、Ahmad M. Farag、Hatem A. Abdel-Aziz
DOI:10.1002/hc.20298
日期:2007.4
afforded the thioacetanilide derivative 3, which when reacted with α-haloketones, α-halodiketones, and hydrazonoyl chlorides gives thiophene, 1,3-oxathiole, and 1,3,4-thiadiazole derivatives 6a,b, 10a,b and 14a–g, respectively. Treatment of 3-methyl-2-benzofurancarboxylic acid hydrazide (15) with benzaldehyde followed by bromine afforded the 1,3,4-oxadiazole derivative 18. Treatment of the acid hydrazide
用异硫氰酸苯酯处理 3-(3-甲基苯并呋喃-2-基)-3-氧代丙腈 (1) 得到硫代乙酰苯胺衍生物 3,该衍生物与 α-卤代酮、α-卤代二酮和腙酰氯反应生成噻吩、1,3 -oxathiole 和 1,3,4-噻二唑衍生物分别为 6a,b、10a,b 和 14a-g。3-甲基-2-苯并呋喃甲酰肼 (15) 用苯甲醛处理,然后用溴处理,得到 1,3,4-恶二唑衍生物 18。用异硫氰酸苯酯处理酰肼 15 得到氨基硫脲 20。可以转化化合物 20分别为 1,3,4-恶二唑、1,2,4-三唑-3-硫酮和 1,3,4-噻二唑衍生物 21、22 和 23。© 2007 Wiley Periodicals, Inc. 杂原子化学 18:294–300, 2007; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.20298