| abstract |
This method provides trimethylhydroquinonendiester by using a recyclable catalyst which shows highnactivity and operability in the reaction, with reducingnthe risk of corrosion of the reactor. The method fornthe production of 2,5,6-trimethylhydroquinone diesterncomprises reacting 2,6,6-trimethylcyclohexe-2-en-1,4-dionenwith an acylating agent in the presence of a solidncatalyst. The acylating agent includes a C 2-4 carboxylicnacid anhydride (e.g. acetic anhydride) and a C 2-4 ncarboxylic acid halide (e.g. acetyl chloride). Thensolid catalyst includes a solid acid catalyst (e.g.nstrongly or super-strongly acidic ion exchange resin,ncompound oxide, zeolite, heteropoly acid). |