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:
Mar. 02, 1976
Filed:
Apr. 10, 1975
Jean-Francois Fort, Paris, FR;
Raymond Giraudon, Le Parc de Lesigny, FR;
Rhone Poulenc S.A., Paris, FR;
Abstract
Oxadiazoline derivatives of the formula: ##SPC1## Wherein R is alkyl of 1 through 4 carbon atoms, which are useful as intermediates in the synthesis of oxadiazoline derivatives of the formula: ##SPC2## Wherein R is as defined above and R.sub.1 is alkyl of 1 through 4 carbon atoms, possessing useful herbicidal properties, are prepared by a process which comprises reducing the nitro group in a 5-alkyl-3-(2-nitro-4-chlorophenyl)-1,3,4-oxadiazolin of the formula: ##SPC3## Wherein R is as defined above to a hydroxylamino group, subjecting the resulting 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one to the Bamberger rearrangement, and converting the amine group in the resulting 5-alkyl-3-(2-amino-4-chloro-5-hydroxyphenyl)-1,3,4-oxadiazolin-2-one to a chlorine atom. The 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one intermediates are compounds.