The Reaction Studies of α-Chloroformylarylhydrazines with Thiols, Thioureas and α-Cyclodiketones
作者:Wen-Fa Kuo、Ming-Shyue Wu、Chun-Yen Chiu、Mou-Yung Yeh
DOI:10.1002/jccs.200100036
日期:2001.4
types of reactions. Further studies on the reaction of α-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 α-chloroformylarylhydrazines with α-cyclodiketones, showing ring cyclization was involved
α-氯甲酰芳基肼 1 与各种类型的硫醇、硫脲和 α-环二酮的反应已被深入研究。当 α-氯甲酰基芳基肼与硫醇反应时,通过硫酯化获得 1-芳基肼硫代碳酸酯 2。另一方面,化合物3是α-氯甲酰芳基肼与含硫杂环化合物反应得到的,这表明这些反应的机理完全不同。对 α-氯甲酰芳基肼 1 与硫脲化合物反应的进一步研究证实了一种新的环化和脱环机制,从而得到 2-芳基肼甲脒 5 和 1,3,4-噻二唑啉-5-酮 6。此外,各种 1 ,3,4-恶二嗪 9 由 α-氯甲酰芳基肼与 α-环二酮反应得到,