- 作者: Wen-Fa Kuoa, Ming-Shyue Wua, Chun-Yen Chiub and Mou-Yung Yeha
- 中文摘要:
aDepartment of Chemistry, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
bDepartment of Environmental Engineering and Health, Tajen Institute of Technology, PingTung 907, R.O.C.
The reactions of a-chloroformylarylhydrazines 1 with various types of mercaptan, thiourea and a-cyclodiketone have been studied intensively. 1-Arylhydrazinecarbothioates 2 were obtained via thio-esterization when a-chloroformylarylhydrazines reacted with thiols. On the other hand, compounds 3 were obtained when a-chloroformylarylhydrazines reacted with thio-containing heterocyclic compounds, which suggested a totally different mechanism in these types of reactions. Further studies on the reaction of a-chloroformylarylhydrazines 1 with thiourea compounds confirmed a novel cyclization and de-cyclization mechanism, which led to give 2-arylhydrazinecarboximidamides 5 and 1,3,4-thiadiazolin-5-ones 6. In addition, various 1,3,4-oxadiazines 9 were obtained by reacting a-chloroformylarylhydrazines with a-cyclodiketones, showing ring cyclization was involved in this type of reaction. - 英文摘要: --
- 中文關鍵字: --
- 英文關鍵字: --