A novel and efficient copper-catalyzed one-pot procedure for the synthesis of 3-N-substituted 1,4,2-benzodithiazine 1,1-dioxide derivatives from 2-halobenzenesulfonamides, amines and CS₂ is described. The reaction proceeds through Ullmann-type S-arylation, intramolecular addition of NH₂ with CS and dehydrosulfide, which provides a new and useful strategy for construction of cyclic aromatic sulfonamides.

中文翻译：

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铜介导的3-N-取代的1,4,2-苯并噻二嗪1,1-二氧化物衍生物的一锅三组分合成

描述了一种新颖且有效的铜催化一锅法，用于从2-卤代苯磺酰胺，胺和CS ₂合成3-N-取代的1,4,2-苯并噻二嗪1,1-二氧化物衍生物。该反应通过乌尔曼型S-芳基化，NH ₂与C S和脱氢硫化物的分子内加成进行，这为构建环状芳族磺酰胺提供了新的有用的策略。