as the final reductant enables the efficient formation of aryl and heteroaryl sulfinate intermediates, which undergo Michael-type additions to electron-deficient alkenes for initiating the hydrosulfonylation process. Moreover, the superiority of this protocol is demonstrated by broad substrate scope and good functional group compatibility.
提出了通过 SO 2插入策略用容易获得的芳香族碘化物进行烯烃的氢磺酰化。非贵金属 Ni 催化与 ( i Pr) 3 SiH 作为最终还原剂的组合能够有效形成芳基和杂芳基亚磺酸盐中间体,这些中间体与缺电子烯烃进行迈克尔型加成以引发氢磺酰化过程。此外,该协议的优越性通过广泛的底物范围和良好的官能团兼容性得到证明。
Pyridylalkyl sulfones
申请人:HOFFMANN LA ROCHE
公开号:US02761865A1
公开(公告)日:1956-09-04
Electroreductive 4-Pyridylation of Electron-deficient Alkenes with Assistance of Ni(acac)<sub>2</sub>
An electroreductive 4-pyridylation of activated alkenes was developed in an undivided cell with the assistance of Ni(acac)(2) (acac = acetylacetone). This novel protocol is compatible with a broad range of electron-poor alkenes, which are commonly regarded as challenging substrates in the previous conventional approaches. Moreover, a series of cyclic voltammetric experiments were conducted to reveal the unique role of Ni(acac)(2) differentiating reduction process of reaction partners.