Herein we report the MoO2Dipic promoted sulfonation of alkenes using N‐Ts‐hydroxylamine as the quantitative source of Ts. The reaction works with high yields and stereoselectivities for styrenes with a wide variety of substitution patterns. A novel atom transfer radical addition mechanism involving the formation of molybdooxaziridine complex 1 as the active catalyst, difunctionalization with Ts‐NO, followed by oxidation, and then elimination as the rate‐determining‐step for the formation of vinylsulfone 3 has been proposed. Initial kinetic and mechanistic data indicates the formation of Ts‐NO and provides evidence for the proposed mechanism.

中文翻译：

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通过钼氧噁氮基催化从取代烯烃合成乙烯基砜


在此，我们报道了 MoO 2 Dipic 使用 N-Ts-羟胺作为 Ts 的定量来源促进烯烃的磺化。该反应对具有多种取代模式的苯乙烯具有高产率和立体选择性。已经提出了一种新的原子转移自由基加成机制，包括形成钼噁氮杂物合物 1 作为活性催化剂，用 Ts-NO 进行二官能化，然后氧化，然后消除作为形成乙烯砜 3 的速率决定步骤。最初的动力学和机制数据表明 Ts-NO 的形成，并为所提出的机制提供了证据。