5- and 6-nitrobenzothiazoles which were distinguished by synthesis of the 2-aryl-4,7-dimethoxy-6-nitrobenzothiaoles 12a–12c by oxidative cyclization of the corresponding nitrothiobenzanilides. Reaction of N-[2,5-dimethoxy-4-(p-tolylsulfonylamino)phenyl]thiobenzamide 17d with base to give 5-methoxy-2-phenyl-6-(p-tolylsulfonylamino)benzothiazole 18 with apparent intramolecular replacement of a methoxy
硝化2-芳基-4,7-二甲氧基
苯并噻唑7a–7c生成5-和6-硝基
苯并噻唑的混合物,其特征在于通过氧化合成2-芳基-4,7-二甲氧基-
6-硝基苯并噻唑12a–12c环化相应的硝基
硫代
苯甲腈。的反应ñ - [2,5-二甲氧基-4-(p -tolylsulfonylamino)苯基]
硫代苯甲酰胺17D用碱,得到5-甲氧基-2-苯基-6-(p -tolylsulfonylamino)
苯并噻唑18与表观分子内替换的甲氧基 也进行了描述。