Mild and efficient organocatalytic method for the synthesis of flavones
作者:Filip Stanek、Maciej Stodulski
DOI:10.1016/j.tetlet.2016.07.042
日期:2016.8
A convenient and efficient organocatalytic procedure for the selective cyclization of 1,3-diketones to give aromatic substituted 4H-chromen-4-ones under mild reaction conditions using N-triflyl phosphoramide is described. Application of the described conditions is presented in a formal synthesis of (S)-flavanone.
Novel Bifunctionalization of Activated Methylene: Base‐Promoted Trifluoromethylthiolation of β‐Diketones with Trifluoromethanesulfinyl Chloride
作者:Dong‐Wei Sun、Min Jiang、Jin‐Tao Liu
DOI:10.1002/chem.201901781
日期:2019.8.14
β-diketones or β-ketoesters with trifluoromethanesulfinyl chloride. A series of α-trifluoromethylthiolated α-chloro-β-diketones and α-chloro-β-ketoesters were obtained in moderate to good yields under mild conditions. When β-diketones containing a phenyl group with a hydroxyl or amino substituent at the ortho position were used as substrates, intramolecular trifluoromethylthiolation/cyclizationreaction took