Studies on the Reaction of α-Chloroformylarylhydrazine Hydrochloride with Imidazole and 1,2,4-Triazole
作者:Chun-Yen Chiu、Jen-Hua Chung、Wen-Fa Kuo、Mou-Yung Yeh
DOI:10.1002/jccs.200200144
日期:2002.12
cyclization of 2 induced by some acyl chlorides. Acetic acid anhydride like acetyl chloride also could react with 2 to produce 7D. 5-Substituted-3-aryl-3H-[1,3,4]oxadiazol-2-one 8 was produced from the cyclization reaction of 3 induced by some acyl chlorides or acetic acid anhydride. The 1,2,4-triazole group of 3 played a role as a leaving group in the course of cyclization reaction. This was confirmed by
α-咪唑甲酰芳基肼2和α-[1,2,4]三唑甲酰芳基肼3分别通过1与咪唑和1,2,4-三唑的亲核取代反应合成。2,2'-Diaryl-2H,2'H-[4,4']bi[[1,2,4]-triazolyl]-3,3'-dione 4 由α-氯甲酰芳基肼盐酸盐I环加成得到与 1,2,4-三唑在 60 °C 和不存在 n-Bu 3 N 的情况下。通过从反应中形成 4 确定 1 与 1,2,4-三唑环加成的诱导因子为氢离子3 与盐酸。4 也是从 3 与 I 的反应中获得的,这可以证实 1 与 1,2,4-三唑的环加成反应路线。一些酰化试剂用于诱导 2 和 3 的环化反应。1 具有氯甲酰基可以诱导 2 的环化得到 2-aryl-4-(2-aryl-4-vinyl-semicarbazide-4-yl)-2,4-dihydro-[1,2,4]-triazol- 3-one 6. 7是由一些酰氯诱导的2环化得到的。乙酸酐如乙酰氯也可以与