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:
May. 12, 1998
Filed:
Mar. 18, 1997
Applicant:
Inventors:
Guenter Krummel, Vendersheim, DE;
Marcus Knell, Ingelheim, DE;
Assignee:
American Cyanamid Company, Madison, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 82 ; 560 80 ; 546341 ;
Abstract
An effective and efficient process for the preparation of dialkyl arylmalonates of formula I, ##STR1## (ring A and R are defined in the specification). In this process, an arylmethylhalide of formula II ##STR2## is treated with magnesium in an inert solvent, the resulting Grignard reagent is treated with a dialkyl carbonate or an alkyl chloroformiate, and the resulting reaction mixture is treated with a base.