Benzotris- (3) and benzobis[1,2,5]thiadiazole (4) were prepared in a moderate yield, respectively, by the reaction of tetrasulfur tetranitride (5) with halocatechols (6) and -resorcinols (7). The reduction of 3 and 4 with Sn powder in a mixture of concentrated hydrochloric acid and dioxane gave benzenehexamine (1) and 1,2,3,4-benzenetetramine (2a) and its 5-methyl derivative (2b) in good yields, as
通过四氮化四
硫 (5) 与卤代
儿茶酚 (6) 和
间苯二酚 (7) 的反应,分别以中等产率制备苯并三- (3) 和苯并双 [1,2,5]
噻二唑 (4)。在浓
盐酸和
二恶烷的混合物中用
锡粉还原 3 和 4 得到苯
六胺 (1) 和 1,2,3,4-苯四胺 (2a) 及其 5-甲基衍
生物 (2b),收率良好,如分别是稳定的三盐酸盐 (1·3HCl) 和二盐酸盐 (2·2HCl)。