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. 26, 1985
Filed:
Dec. 19, 1983
Hans Tobler, Allschwil, CH;
Karl Hoegerle, Basel, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
2,4-Diamino-6-halo-5-trifluoromethylpyrimidines of the formula ##STR1## wherein X is a halogen atom, especially chlorine or fluorine, and R.sub.1 and R.sub.2 independently of one another are each hydrogen, C.sub.1 -C.sub.6 -alkyl or C.sub.3 -C.sub.6 -cycloalkyl, or together form a C.sub.3 -C.sub.7 -alkylene bridge, have outstanding selective-herbicidal properties, and are suitable for controlling weeds in crops of cultivated plants, such as maize, cereal or soya-bean. They are produced by aminating 2,4,6-trihalo-5-trifluoromethylpyrimidine, which for its part is obtainable by fluorination of 2,4,6-trihalopyrimidine-5-carboxylic acid. The 2,4,6-trihalo-5-carboxylic acids are novel intermediates, and are obtained by oxidizing 2,4,6-trihalo-2-methyl-, -halomethyl- or -formyl-pyrimidine in sulfuric acid by means of chromium trioxide.