Base-promoted aerobic oxidation of <i>N</i>-alkyl iminium salts derived from isoquinolines and related heterocycles
作者:Li-Gang Bai、Yue Zhou、Xin Zhuang、Liang Zhang、Jian Xue、Xiao-Long Lin、Tian Cai、Qun-Li Luo
DOI:10.1039/c9gc03629f
日期:——
scope, low cost, feasibility of scale up, wide availability of reagents, and green reaction conditions, this method shows great potential for preparing isoquinolones and related compounds. The method was applied for atom- and step-economical total synthesis of natural products such as norketoyobyrine.
Cascade Palladium-Catalyzed Alkenyl Aminocarbonylation/ Intramolecular Aryl Amidation: An Annulative Synthesis of 2-Quinolones
作者:Andrew C. Tadd、Ai Matsuno、Mark R. Fielding、Michael C. Willis
DOI:10.1021/ol802624e
日期:2009.2.5
Palladium-catalyzed intermolecular aminocarbonylation/intramolecular amidation cascade sequences can be used to convert a range of 2-(2-haloalkenyl)aryl halide substrates efficiently and selectively to the corresponding 2-quinolones. Delaying the introduction of the CO atmosphere allows an amination/carbonylation sequence and the preparation of an isoquinolone.
Visible light-induced one-pot synthesis of CF<sub>3</sub>/CF<sub>2</sub>-substituted cyclobutene derivatives
作者:Xiao Hu、Aishun Ding、Dawen Xu、Hao Guo
DOI:10.1039/d1cc02696h
日期:——
trifluoromethyl/gem-difluoromethylene substituted cyclobutenederivatives has been developed. The mechanism may involve visible light-induced [2+2]-cycloaddition of quinolinones with 1-bromo-1-trifluoromethylethene, followed by base-promoted dehydrobromination, [1,3]-H shift and further dehydrofluorination. A variety of CF3/CF2-substituted cyclobutenes that are currently difficult to obtain are afforded
One-pot synthesis of cyclobutenecarboxylate derivatives via olefinic C-F bond functionalization of gem-difluoroalkenes
作者:Xiao Hu、Yang Li、Hao Guo
DOI:10.1016/j.tetlet.2022.153673
日期:2022.3
A one-pot approach which provides a series of cyclobutenecarboxylates in moderate to excellent yields has been developed. This strategy involves visible light-induced [2+2]-photocycloaddition of quinolinones with 1-bromo-1-trifluoromethylethene, followed by tandem sodium alkoxide-promoted elimination, nucleophilic vinylic substitution and hydrolysis. The in-situ generated gem-difluoroalkene is the
Selective Reduction of Quinolinones Promoted by a SmI<sub>2</sub>/H<sub>2</sub>O/MeOH System
作者:Dengbing Xie、Songlin Zhang
DOI:10.1021/acs.joc.2c00389
日期:2022.7.1
The selectivereduction of quinolin-2(1H)-ones promoted by a SmI2/H2O/MeOH system is reported for the first time. The reaction is effectively carried out to afford 3,4-dihydroquinoline-2(1H)-ones under mild conditions in a one-pot fashion with good to excellent yields.
首次报道了由 SmI 2 /H 2 O/MeOH 体系促进 quinolin-2(1 H )-ones的选择性还原。该反应在温和条件下以一锅法有效地进行,得到 3,4-二氢喹啉-2(1 H )-酮,产率从良好到优异。