A new efficient preparation of 4-alkyl- and aryl-substituted 3-amino- 4H-1,2,4-benzothiadiazine 1,1-dioxides (3) is described via the 3-chloro derivatives of 4-alkyl- and aryl substituted 3-oxo-2H-3,4-dihydro-1,2,4-benzothiadiazine 1,1-dioxides, (1) on their treatment with aqueous ammonia solution.
通过4-烷基和芳基取代的3-氧代-2H-3,4-二氢-1,2,4-苯并噻二嗪1,1-二氧化物(1)的3-
氯衍
生物与
氨水溶液处理,描述了一种新的4-烷基和芳基取代的3-
氨基-4H-1,2,4-苯并噻二嗪1,1-二氧化物(3)的高效制备方法。