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

1991-08-26

1992-05-12

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C07C 6973

Patent

active

051130122

ABSTRACT:
A process 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 alkoxycarbonyl alkoxycyclopentenone, the ester function is saponified, and finally the intermediate is decarboxylated to the end product.

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Aldrichimica Acta, vol. 10, No. 1, (1977), p. 19.
Chemische Berichte, vol. 111, (1978), pp. 2462-2464, "1,3-Cyclopentanedione--a Prized Reagent", C. Lick and K. Schank.

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