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. 15, 1980
Filed:
Aug. 01, 1979
Raymond D Clark, Kingsport, TN (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Disclosed is a process comprising reacting the reaction product of cyclopentanone and methyl cyanoacetate with cyanoacetamide and/or the reaction product of cyclopentanone and cyanoacetamide with methyl cyanoacetate, in the presence of a basic catalyst, to give the intermediate .beta.,.beta.-tetramethylene-.alpha.,.alpha.'-dicyanoglutarim ide, or its salt. In the process, the said reaction products may be formed together in the same reaction system, and the said intermediate preparation preferably is carried out between about 10.degree. C. and about 50.degree. C., in a polar, aprotic solvent, and in the presence of a basic catalyst, e.g., such as triethylamine. The intermediate may then be hydrolyzed to the cyclopentane-1,1-diacetic acid.