A four-component reaction of aryldiazonium tetrafluoroborates, sulfur dioxide, 1,2-dibromoethane, and hydrazines
2015 ◽
Vol 13
(41)
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pp. 10370-10375
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A four-component reaction of aryldiazonium tetrafluoroborates, sulfur dioxide, 1,2-dibromoethane, and hydrazines under metal-free conditions is described, leading to 2-arylsulfonyl hydrazones. This transformation proceeds via insertion of sulfur dioxide with good functional group tolerance.