Process for producing optically active cyclopentenolones

Details Process for producing optically active cyclopentenolones Process for producing optically active cyclopentenolones

1984-05-21

1986-02-18

Reamer, James H.

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

Organic compounds

Oxygen containing

560231, 260456R, C07C 4565

Patent

active

045714363

ABSTRACT:
Optically active cyclopentenolones, which are useful as an intermediate of pyrethroid insecticides, are produced from racemic cyclopentenolones according to the following procedures; (1) asymmetric hydrolysis of racemic carboxylate esters of the cyclopentenolones, (2) nitrate- or sulfonate-esterification of the asymmetrical hydrolysis products, and (3) hydrolysis of the esterification products.

REFERENCES:
patent: 3009944 (1961-11-01), Brunnberg
patent: 3189654 (1965-06-01), Arthur
patent: 4000179 (1976-12-01), Ayerst
patent: 4205008 (1980-05-01), Martel et al.
patent: 4385186 (1983-05-01), Matsuo et al.
Chem. Abst. vol. 85 (1976) p. 445, No. 61429y.
Patent Abstracts of Japan, vol. 2, No. 89, Jul. 21, 1978, p. 1439C78 and JP--A--5350397.

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