Optically active 4-hydroxy-2-cyclopentenones, and their producti

Details Optically active 4-hydroxy-2-cyclopentenones, and their producti Optically active 4-hydroxy-2-cyclopentenones, and their producti

1984-12-11

1988-03-08

Kepplinger, Esther M.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing oxygen-containing organic compound

435280, 435874, C12P 738, C12P 4100, C12R 138

Patent

active

047299533

ABSTRACT:
A process for preparing an optically active 4-hydroxy-2-cyclopentenone of the formula: ##STR1## wherein R.sub.1 is a hydrogen atom or a methyl group, R.sub.2 is an alkyl group, an alkenyl group or an alkynyl group and the asterisk (*) indicates an asymmetric configuration, which comprises subjecting an optically active 4-cyclopentenone-alcohol of the formula: ##STR2## wherein R.sub.1 and R.sub.2 are each as defined above, the asterisk (*) indicates an asymmetric configuration and the substituents R.sub.1 and R.sub.2 take a cis-configuration to rearrangement while maintaining the original steric configuration.

REFERENCES:
patent: 3931291 (1976-01-01), Horiuchi
patent: 3947519 (1976-03-01), Matsui et al.
patent: 4005146 (1977-01-01), Goffinet
patent: 4265817 (1981-05-01), Martel et al.
patent: 4347386 (1982-08-01), Saito et al.
patent: 4374257 (1983-02-01), Martel et al.
patent: 4511655 (1985-04-01), Minai et al.
Derwent Abstract, 57298b/31, (1979).

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