Process for the production of dimedone

Details Process for the production of dimedone Process for the production of dimedone

C - Chemistry, Metallurgy

07

C

260/582.7

C07C 49/403 (2006.01) C07C 45/45 (2006.01)

Patent

CA 1219002

PROCESS FOR THE PRODUCTION OF DIMEDONE ABSTRACT OF THE DISCLOSURE Process for the production of dimedone from isophorone. The isophorone is converted in the presence of a solvent with ozone into an ozone-addition product. An alcohol corresponding to the ester radical is added at the latest after the formation of the ozone-addition product for the formation of the inter- mediate product 3,3-dimethvl-5-oxo-hexanoic acid ester. The ozone addition product is heated in the presence of acids to a temperature of 20° to 150°C. The 3,3-dimethyl-5-oxo- hexanoic acid ester is isolated thereby. The ester is then converted in a further step into dimedone by treatment of the ester with an alkali alcoholate in an anhydrous milieu.

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