Process for preparation of an S-alpha-cyano S-alpha-isopropylphe

Details Process for preparation of an S-alpha-cyano S-alpha-isopropylphe Process for preparation of an S-alpha-cyano S-alpha-isopropylphe

1984-03-05

1985-07-02

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12175

Patent

active

045267278

ABSTRACT:
A method of preparing an "A-alpha" single stereoisomer of an S-alpha-cyano-3-phenoxybenzyl S-alpha-isopropylphenylacetate by precipitation from a solution of an "alpha" diastereoisomer pair, S-alpha-cyano-3-phenoxybenzyl R,S-alpha-isopropylphenylacetate, and optional hydrolysis of the mother liquor and recycle of the components thereof. The phenylacetate "alpha" is prepared from the S-alpha-cyano-3-phenoxybenzyl alcohol and racemic alpha-isopropylphenylacetic acid or reactive derivative thereof.

REFERENCES:
patent: 4273727 (1981-06-01), Martel et al.
patent: 4293504 (1981-10-01), Suzuki et al.
patent: 4312816 (1982-01-01), Abeta et al.
patent: 4321212 (1982-03-01), Suzuki et al.

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