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. 25, 1978
Filed:
May. 25, 1976
Applicant:
Inventor:
Ralph Alexander Raphael, Cambridge, GB;
Assignee:
Imperial Chemical Industries Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603436 ; 2605 / ; 2605855 ; 2605 / ; 560123 ;
Abstract
A process for preparing a 5-(2,2-dihalovinyl)-4,4-dimethyl-2-oxotetrahydrofuran of formula: ##STR1## wherein X and Z are each either chlorine or bromine, which comprises the step of treating a compound of formula: ##STR2## with an excess of a base selected from alkali metal hydroxides and chemical equivalents thereof.