les, 2, have been prepared by two different methods. Reaction of bromo-2,1,3-benzothiadiazoles, 1, with cuprous cyanide occurs advantageously in refluxing dimethylformamide to give 2, complexed with curpous bromide. Hydrogen peroxide in hydrochloric acid at 30–40° is shown to be an effective reagent for efficient decomposition of these reactions complexes, 2 CuBr, and subsequent isolation of 2. Yields
2,1,3-Benzothiadiazolecarbonitriles,2,制备由两种不同的方法。
溴-
2,1,3-苯并噻二唑1与
氰化亚铜的反应有利地发生在回流的二甲基甲酰胺中,生成2与
溴化
氯络合的化合物。在30-40在
盐酸过氧化氢被示°是用于这些反应的复合物的高效分解,有效试剂2 CuBr和随后分离2.在桑德迈尔方法产生用于制备腈2通过重氮化
氨基-2-得到改善在与亚
铜氰化钠络合物反应之前,先用亚
硝酰基-
硫酸将1,,3-苯并
噻二唑3。