Novel heterocycles derived from substituted aroylthioureas: Synthesis of 3, l-benzothiazin-4-ones, thieno[3,2-<i>d</i>][1,3]thiazin-4-ones and 1,2,4-thiadiazolo[2,3-<i>a</i>][3,1]benzothiazin-5-ones
作者:M. Gütschow
DOI:10.1002/jhet.5570330225
日期:1996.3
A series of heterocyclic aroylthioureas has been prepared and investigated as starting materials for ring closure reactions. The formation of several new 3,1-benzothiazin-4-ones and thieno[3,2-d][1,3]thiazin-4-ones (via cyclocondensation reactions) is reported. Oxidative cyclizations were carried out to produce methyl benzothiazole-4-carboxylates (via formation of an S-C bond) as well as 1,2,4-thiadiazolo-[2
已经制备了一系列杂环芳基硫脲并作为闭环反应的起始原料进行了研究。据报道(通过环缩合反应)形成了几个新的3,1-苯并噻嗪-4-酮和噻吩并[3,2- d ] [1,3]噻嗪-4-酮。进行氧化环化反应生成苯并噻唑-4-羧酸甲酯(通过形成SC键)以及1,2,4-噻二唑-[2,3- a ] [3,1]苯并噻嗪-5-酮(通过形成S N键)。