A straightforward and stereoselective preparation of (Z)-β-alkenyl sulfones through a reaction of N-tosyl acrylamides, 1,4-diazabicyclo[2.2.2]octane-sulfur dioxide, and aryldiazonium tetrafluoroborates under copper catalysis is accomplished. The direct C(sp²)–H arylsulfonylation of acrylamides using sulfur dioxide as the sulfonyl source in the presence of copper trifluoroacetate proceeds smoothly, giving rise to (Z)-β-alkenyl sulfones in good yields. During the reaction process, excellent regio- and stereoselectivities are observed.

中文翻译：

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指导小组协助二氧化硫的C（sp2）-H芳基磺酰化。

通过在铜催化下的N-甲苯磺酰基丙烯酰胺，1,4-二氮杂双环[2.2.2]辛烷-二氧化硫和芳基重氮四氟硼酸酯的反应，完成了（Z）-β-烯基砜的直接和立体选择性制备。在三氟乙酸铜存在下，使用二氧化硫作为磺酰基源，丙烯酰胺的直接C（sp ²）-H芳基磺酰化反应顺利进行，从而以高收率产生了（Z）-β-烯基砜。在反应过程中，观察到优异的区域选择性和立体选择性。