Process for preparing 2-cyclopentenone esters

Details Process for preparing 2-cyclopentenone esters Process for preparing 2-cyclopentenone esters

1983-08-16

1985-08-13

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

560254, 560255, 560256, C07C 6902

Patent

active

045351821

ABSTRACT:
2-Cyclopentenone esters of the formula: ##STR1## wherein R.sup.1 is hydrogen, lower alkyl or lower alkenyl, R.sup.2 is lower alkyl, lower alkenyl, lower alkynyl, or cycloalkyl, cycloalkenyl or substituted or unsubstituted aryl and R.sup.3 is hydrogen or lower alkyl are prepared in high yields by reacting the corresponding racemic or optically active 4-cyclopentenone of the formula: ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above and R.sup.3 is hydrogen or acyl with at least one lower aliphatic carboxylic acid and/or metal or amine salts thereof.

REFERENCES:
patent: 4347386 (1982-08-01), Saito et al.
patent: 4371711 (1983-02-01), Saito et al.

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