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:
Dec. 18, 1984
Filed:
Sep. 15, 1983
Applicant:
Inventor:
Gary Scholes, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07C / ;
U.S. Cl.
CPC ...
260430 ; 260464 ;
Abstract
Compounds of the general formula ##STR1## in which a chlorine or bromine atom and A represents a hydrogen or metal atom or an alkyl group of 1 to 4 carbon atoms, are prepared by cyclizing a compound of the general formula ##STR2## in which Hal' represents a chlorine or bromine atom, in the presence of an acid. The resulting compound is a useful intermediate in the synthesis of certain pyrethroid insecticides.