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:
Nov. 13, 1979
Filed:
May. 30, 1978
Applicant:
Inventors:
Petrus A Kramer, Amsterdam, NL;
Helena Austermuhle-Bertola, Amsterdam, NL;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260464 ; 562506 ;
Abstract
A novel process is disclosed for the preparation of cyclopropanecarbonitriles of the general formula: ##STR1## wherein R.sub.1, R.sub.2 and Hal have the meanings given in the description; which comprises heating the corresponding ammonium or aminium cyclopropanecarboxylate in the presence of a polar aprotic solvent. The process produces cyclopropanecarbonitriles, in high yields, which are useful as intermediates in the production of insecticidally active compounds.