Oxidative Generation of 1-Nitroalkyl Radicals and Their Addition Reaction to Olefins
作者:Noriyoshi Arai、Koichi Narasaka
DOI:10.1246/bcsj.70.2525
日期:1997.10
1-Nitroalkyl radicals are generated by oxidation of potassium salt of 1-aci-nitroalkanes with ammonium hexanitratocerate(IV). When the oxidation is carried out in the presence of electron-rich olefins, such as silyl enol ethers, intermolecular addition of the radicals onto the olefins proceeds to afford β-nitro ketones, which are further converted to α,β-unsaturated ketones in high yield. Stereoselective
Novel Task-Specific Ionic Liquids as Solvents for Michael Addition of Methylene Active Compounds to Chalcones Without Any Catalyst
作者:An-Guo Ying、Xin-Zhi Chen、Cheng-Lin Wu、Ren-Hua Zheng、Hua-Ding Liang、Chang-Hua Ge
DOI:10.1080/00397911.2011.584260
日期:2012.12.1
Abstract A convenient and facile method for Michael addition of methyleneactivecompounds to chalcones has been developed by using 1,8-diazabicyclo [5.4.0]undec-7-ene- derived task-specific ionic liquids as reaction medium in the absence of any catalyst. This protocol could afford the Michael adducts in good to excellent yields in a short time, the workup is very simple, and the ionic liquid could