Diazo reactions with unsaturated compounds: VIII. Reaction of 1,3-butadiene and isoprene with aromatic and aliphatic-aromatic triazenes in the presence of sulfur(IV) oxide
A selective three-component 1,2-sulfonyl etherification of aryl 1,3-dienes enabled by copper catalysis to afford biologically interesting alkenyl 1,2-sulfone ether derivatives through C–S and C–O bond formation is described. The protocol proceeds with the sulfonyl chloride and alcohols under simple, mild, and base-free conditions, providing a straightforward route to sulfonylated allyl ether compounds