83229-03-2Relevant academic research and scientific papers
Gold(III)-Catalyzed Intermolecular Oxidation-Cyclization of Ynones: Access to 4-Substituted Chroman-3-ones
Li, Jian,Yang, Fang,Ma, Yang-Ting,Ji, Kegong
, p. 2148 - 2153 (2019/03/28)
A synthesis of 4-substituted chroman-3-one derivatives has been developed through a gold(III) catalyzed oxidation-cyclization of ynones in good to excellent yield using easily prepared substrates. A broad range of synthetically useful functional groups (halide, alkene, alkyne, phenolic hydroxyl) were tolerated. Further application of this method paves a new way to prepare the skeleton of oblarotenoids. A cascade oxidative cyclization for construction of pyrano[2,3-c]chromen-1(5H)-one derivatives is also presented. (Figure presented.).
SYNTHESIS AND REACTIONS OF BENZOFUROPYRYLIUM SALTS
Dulenko, V. I.,Tolkunov, S. V.
, p. 730 - 733 (2007/10/02)
A method has been developed for the synthesis of 3-acetonyl- and 3-phenacylbenzofurans by cyclization of 1-aryloxy-2,4-pentanediones and 1-phenyl-4-aryloxy-1,3-butanediones in polyphosphoric acid.Acylation of 3-acetonyl(phenyl-benzofurans) with alip
