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. 16, 1989
Filed:
Dec. 14, 1987
Stephen Lachhein, Hofheim am Taunus, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Process for the preparation of aminopyrimidines Pyrimidines of the formula I ##STR1## in which X and Y denote oxygen or sulfur and R.sup.1 and R.sup.2 denote C.sub.1 -C.sub.4 -alkyl, (C.sub.1 -C.sub.4 -alkoxy)-C.sub.1 -C.sub.2 -alkyl or halo-C.sub.1 -C.sub.4 -alkyl, are obtained through reaction of propanediimidates of the formula II ##STR2## or salts thereof with cyanurates of the formula R.sup.3 --O--CN in which R.sup.3 denotes C.sub.1 -C.sub.4 -alkyl, phenyl, phenyl which is substituted by 1, 2 or 3 radicals from the series comprising halogen, C.sub.1 -C.sub.4 -alkoxy and C.sub.1 -C.sub.4 -alkyl radicals, .alpha.- or .beta.-naphthyl or halo-C.sub.1 -C.sub.4 -alkyl, in an organic solvent which is inert under the reaction conditions. The one-step process permits efficient preparation of the compounds of the formula I, which can be used as intermediates for the preparation of herbicidal sulfonylureas.