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Cross-Electrophile Sulfonylation Involving Morita-Baylis-Hillman Acetates and Alkyl Halides: Access to Allyl-Alkyl
Abuthayir Mohamathu Ghouse1,2, Bathula Maheswari1,2, Rahul Siribimat1
1Department of Organic Synthesis & Process Chemistry, Council of Scientific & Industrial Research (CSIR)-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India.
Abstract:
A transition-metal-, photocatalyst-, and light-irradiation-free cross-electrophile sulfonylative method has been developed. This approach, which even avoids metal reductants, such as Zn or Mn, leverages readily available Morita-Baylis-Hillman (MBH) acetates and alkyl halides. The core of this methodology is the dual action of sodium dithionite (Na2S2O4), which transforms electrophilic alkyl halides into nucleophilic alkyl sulfinates through single-electron reduction and SO2 incorporation. This robust and general route enables the synthesis of allyl-alkyl sulfones with high chemo-, regio-, and stereoselectivities, demonstrating broad substrate generality, including pharmaceutically relevant compounds.
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