| 摘要 |
NEW MATERIAL:A 1,4,5,8-tetraacyloxytetralin derivative expressed by formula I (Y is H or acyl; R<1>, R<2> and R<3> are H, lower alkyl or R<1> and R<2> may condense into a ring and add to form benzene ring). EXAMPLE:1,4,5,8-Tetraacetyloxytetralin. USE:Useful as a synthetic intermediate for naphthazarrin or quinizarin which is a synthetic intermediate for medicines and dyes, or as a monomer for polyesters, polyurethanes, polycarbonates, epoxy resins, etc. PREPARATION:A 5,8-diacyltetralin derivative expressed by formula II (AC is acyl) is oxidized with oxygen in the presence of a catalyst, such as cobalt acetate, in a lower fatty acid or anhydride thereof (preferably acetic anhydride) to afford the aimed compound expressed by formula I. The reaction temperature is preferably 90-150 deg.C and the reaction pressure is preferably 15-40atm. |
