Crystal of enantiomer pair of phenylacetic acid ester derivative

Details Crystal of enantiomer pair of phenylacetic acid ester derivative Crystal of enantiomer pair of phenylacetic acid ester derivative

1981-12-01

1984-02-21

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12175

Patent

active

044329083

ABSTRACT:
A crystal of an enantiomer pair of stereoisomers of .alpha.-cyano-3-phenoxybenzyl 2-(4-chlorophenyl)isovalerate (general name: fenvalerate) comprising (S)-.alpha.-cyano-3-phenoxybenzyl (S)-2-(4-chlorophenyl)isovalerate and an enantiomer thereof, which has the crystal characteristics as specified in the specification, is disclosed. A process for preparing the enantiomer pair or the fenvalerate rich in the enantiomer pair by depositing the above-described crystal from a solution of a racemate of fenvalerate is also disclosed. A process for preparing the enantiomer pair by depositing the crystal from a solution of the fenvalerate rich in the enantiomer pair is further disclosed.

REFERENCES:
patent: 4133826 (1979-01-01), Warnant et al.
patent: 4238406 (1980-12-01), Suzuki et al.
patent: 4279924 (1981-07-01), Suzuki et al.
patent: 4293504 (1981-10-01), Suzuki et al.
patent: 4312816 (1982-01-01), Aketa et al.
patent: 4321212 (1982-03-01), Suzuki et al.

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