Deoxygenative debromination of α-bromo-β-hydroxy (acetoxy) phenyl sulfones with samarium(II) iodide led to substituted α,β-unsaturatedsulfones in good to excellent yields. The E-isomer is the major product. A possible mechanism via an α-sulfonyl radical pathway is proposed.
Air Induced Phosphoryl Radical Mediated Stereoselective Hydrosulfonylation of Alkynes <i>via</i> Halogen Atom Transfer: Ingress of <i>Z</i>-Vinyl Sulfones
作者:Shashikant Tiwari、Manisha Kumari、Diwan S. Rawat
DOI:10.1021/acs.orglett.4c00539
日期:2024.3.22
phosphoryl radical is well-known to participate in addition reactions with alkenes/alkynes. Here, we report a novel reaction mode of the phosphoryl radical where it participates in halogen atom transfer (XAT) with electron deficient vinyl halides instead of a facile addition reaction. Nevertheless, in comparison with aryl and alkyl halides, the exploitation of vinyl halides into a carbon radical via XAT