Synthesis of α,α-difluoro-β-amino carbonyl-containing sulfonamides and related compounds
作者:Chen Xie、Lingmin Wu、Jie Zhou、Haibo Mei、Vadim A. Soloshonok、Jianlin Han、Yi Pan
DOI:10.1016/j.jfluchem.2015.01.004
日期:2015.4
Mannich addition reactions between in situ generated α,α-difluoroenolates and various N-sulfonyl imines readily occur with exceptionally high reaction rates at ambient temperature. The method features remarkable generality and enjoys operationally convenient conditions underscoring its practicality and methodological importance for preparation of sulfonamides bearing β-amino-α,α-difluoro ketone moiety
A Highly Efficient Gold(I)-Catalyzed Mukaiyama–Mannich Reaction of α-Amino Sulfones with Fluorinated Silyl Enol Ethers To Give β-Amino α-Fluorinated Ketones
Ph3PAuOTf was identified as a powerful catalyst for the Mukaiyama–Mannich reaction of fluorinated silyl enol ethers with α-amino sulfones. This provides ready access to β-amino α-fluorinated ketones in good to excellent yields.
Internally reuse by-product as promoter: A catalyst-free imine formation/Mukaiyama-Mannich sequence of α-amido sulfones with fluorinated silyl enol ethers
作者:Xiao-Si Hu、Jin-Sheng Yu、Yi Gong、Jian Zhou
DOI:10.1016/j.jfluchem.2019.01.003
日期:2019.3
Described herein is a catalyst-free tandem imine formation/Mukaiyama-Mannich sequence of fluorinated silyl enol ethers and α-amidosulfones, allowing the efficient synthesis of value-added β-amino α-fluorinated ketones in good to excellent yields. Noticeably, the key for high efficacy of the catalyst-free reaction is attributed to the in situgenerated acidic by-product PhSO2X (X = TMS or H) that can