Copper-catalyzed practical route for the synthesis of benzothiadiazine 1,1-dioxides has been developed. The method involves CH functionalization of arylacetic acids to form aromatic aldehydes and their subsequent condensation with 2-aminobenzenesulfonamide. This functional group tolerant approach furnished benzothiadiazine 1,1-dioxide derivatives in good to excellent yields. Broad substrate scope, inexpensive catalyst and high product yields are notable features of this protocol.

中文翻译：

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过渡金属催化芳族酸的C H官能化反应合成苯并噻二嗪1,1-二氧化物

已经开发了铜催化的合成苯并噻二嗪1，1-二氧化物的实用路线。该方法包括芳基丙烯酸的C H官能化以形成芳族醛，以及它们随后与2-氨基苯磺酰胺的缩合。这种对官能团的耐受性使苯并噻二嗪1,1-二氧化物衍生物具有良好或优异的收率。该方案的显着特点是广泛的底物范围，廉价的催化剂和高产品收率。