A new photoinduced acylation/arylation of N-(arylsulfonyl)acrylamide with acyl oxime esters through a nitrogen-centered radical protocol has been disclosed for efficient preparation of functionalized indolin-2-ones, which proceeds through a cascade acylradical addition of carbon-carbon double bond, aryl migration, desulfonylation, and intramolecular cyclization sequence. This redox-neutral strategy
A radical Smiles rearrangement difunctionalization of activated alkenes via desulfonylation and insertion of sulfur dioxide relay strategy
作者:Si-Wei Tian、Zhen-Tao Luo、Bi-Quan Xiong、Ke-Wen Tang、Peng-Fei Huang、Yu Liu
DOI:10.1039/d4gc00186a
日期:——
alkylsulfonylated oxindoles and amides through a radical Smiles rearrangement strategy was reported. A tandem SO2 insertion/1,4-aryl migration/desulfonylation/cyclization sequence was involved in this transformation. Readily available Hantzsch esters served as alkylation reagents. Two different products were constructed depending on the substituent group of the nitrogen atom.
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