Abstract
A cascade reaction of cyclopropyl alcohols, DABSO (1,4-diazoniabicyclo[2.2.2]octane-1,4-disulfinate), and N-(sulfonyl)acrylamides has been developed. This tandem process went through a cyclopropanol ring opening and Michael addition sequence. The γ-keto sulfinate generated from the reaction between cyclopropanol and DABSO serves as the nucleophilic reagent, and N-(sulfonyl)acrylamide is used as the Michael addition acceptor. By utilizing this strategy, multitudinous sulfone-bridged 1,7-dicarbonyl compounds that contain both a β-sulfonyl amide unit and γ-keto sulfone skeleton were conveniently synthesized.
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