The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 1985
Filed:
Mar. 05, 1984
Applicant:
Inventor:
Walter L Petty, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2604 / ;
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.