An efficient approach to regio‐ and stereoselective synthesis of (Z)‐vinylsulfonylated quinoxalin‐2‐ones has been developed. This oxidative reaction involves copper‐catalyzed vinylsulfonylation of quinoxalin‐2(1H)‐ones with alkynes and sulfonyl hydrazides. Various functionalized vinylsulfonylated quinoxalin‐2(1H)‐one derivatives have been synthesized in excellent yields. The reaction proceeds via sulfonyl radicals generated from sulfonyl hydrazides.

中文翻译：

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铜催化喹喔啉酮与炔烃和磺酰肼的区域和立体选择性氧化乙烯基磺酰化

开发了一种有效的区域和立体选择性合成（Z）-乙烯基磺酰化喹喔啉-2-酮的方法。该氧化反应涉及奎宁沙林2（1 H）-酮与炔烃和磺酰肼的铜催化乙烯基磺酰化反应。各种功能化的乙烯基磺酰化喹喔啉-2（1 H）-one衍生物均已以优异的产率合成。反应通过由磺酰肼生成的磺酰基进行。