Three-Component Reaction of Cyclopropanols, DABSO, and <i>N</i>-(Sulfonyl)acrylamides: Preparation of Sulfone-Bridged 1,7-Dicarbonyl Compounds
Fei Chen, Xiao Li, Ke-Ying Liu, Dong-Wang He, Liu-Yan You, Chenlu Wang, Jun-Ya Guo, Si-Yu Tian, Shu-Man Wang, Yu-Xin Lai, Yang Zheng, Yunhe Lv, Kai Sun
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.