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:
Jan. 06, 1998
Filed:
Aug. 03, 1995
Andreas Dierdorf, Frankfurt, DE;
Theodor Papenfuhs, Frankfurt, DE;
Hoechst Aktiengesellschaft, , DE;
Abstract
The present invention relates to a process for the preparation of O-acylglycolanilides of the formula (1) ##STR1## in which R.sup.1 and R.sup.2 are identical or different and are hydrogen, halogen, a nitro group, a cyano group, a straight-chain or branched alkyl, alkenyl, alkynyl or alkoxy group having from 1 to 12 carbon atoms, an aralkyl group having from 7 to 12 carbon atoms, a cycloalkyl group having from 6 to 12 carbon atoms or an aryl group having from 6 to 12 carbon atoms,. R.sup.3 is hydrogen or a straight-chain or branched alkyl group having from 1 to 12 carbon atoms, and R.sup.4 is an alkyl group having from 1 to 6 carbon atoms or is a substituted or unsubstituted phenyl radical, in which an aniline of the formula (2) ##STR2## in which R.sup.1, R.sup.2 and R.sup.3 have the same meaning as in formula (1), and an O-acylglycolic acid of the general formula (3) ##STR3## in which R.sup.4 has the same meaning as in formula (1), are reacted with an inorganic acid halide, optionally in the presence of an inert organic solvent, at from 20.degree. to 180.degree. C.