Enantioselective Synthesis of β-Quaternary Carbon-Containing Chromanes and 3,4-Dihydropyrans via Cu-Catalyzed Intramolecular C-O Bond Formation.
Jinhui CaiZhen-Kai WangMuhammad UsmanZhi-Wu LuXu-Dong HuWen-Bo LiuPublished in: Organic letters (2019)
A copper-catalyzed efficient enantioselective construction of chiral quaternary carbon-containing chromanes and 3,4-dihydropyrans is reported. The desymmetric C-O coupling is enabled by a chiral dimethylcyclohexane-1,2-diamine ligand and provides the desired products in good yields with high enantioselectivities. This method presents a broad substrate scope and is applicable to diversely substituted aryl bromides and alkenyl bromides. The application is demonstrated by a gram-scale synthesis and derivatization of the products toward valuable building blocks.
Keyphrases
- room temperature
- ionic liquid
- capillary electrophoresis
- ms ms
- gram negative
- liquid chromatography tandem mass spectrometry
- molecular docking
- high performance liquid chromatography
- liquid chromatography
- simultaneous determination
- mass spectrometry
- tandem mass spectrometry
- multidrug resistant
- solid phase extraction
- quantum dots
- high density