Process for the production of 1,3-cyclopentanedione

Details Process for the production of 1,3-cyclopentanedione Process for the production of 1,3-cyclopentanedione

C - Chemistry, Metallurgy

07

C

260/583.7, 260/4

C07C 49/395 (2006.01) C07C 45/67 (2006.01) C07C 69/734 (2006.01)

Patent

CA 2007263

ABSTRACT OF THE DISCLOSURE A process is disclosed for the production of 1,3- cyclopentanedione, which is a versatile intermediate product for numerous active ingredient syntheses. For this purpose, a malonic acid ester is reacted with a haloalkoxybutenoic acid ester, the resultant bis- (alkoxycarbonyl)alkoxypentenoic acid ester is cyclized to form the alkoxycarbonyl alkoxycyclopentenone, the ester function is saponified, and finally the intermediate is decarboxylated to produce the desired end product.

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