Method for making N-substituted acrylamides

US4312998A · kind A · utility

Assignee

• Chemische Fabrik · DE

Inventors

• Erich Kuster · Krefeld, DE
• Bernhard Goossens · Velbert, DE
• Kurt Dahmen · Rheydt, DE
• Eduard Barthell · Krefeld, DE

Key dates

• Filing date: May 2, 1980
• Grant date: Jan 26, 1982
• Expiry date: May 2, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C231/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of N-substituted acrylamides of the general formula ##STR1## wherein Y denotes a bivalent straight - or branched chain radical with 2 to 30, preferably 2 to 18, and particularly 2 to 6 carbon atom-, preferably a group of the formula (Y.sub.1).sub.m -(Y.sub.2).sub.n -(Y.sub.3).sub.t, in which PA1 Y.sub.1, Y.sub.2 and Y.sub.3 each stands for an alkylene group or the radical of a cyclic organic ring system with 5 or 6 carbon atoms, and the sum of m, n, and t is 2 or 3, and R.sub.1 denotes hydrogen or the radical of an amine of the formula N(R.sub.2) (R.sub.3), wherein PA1 R.sub.2 and R.sub.3 stand for alkyl radicals with 1 to 4 carbon atoms, which method is characterized in that dihydracrylic acid amide of the general formula ##STR2## is transmitted with amines of the general formula EQU H.sub.2 N--(Y)--R.sub.1 (III) PA1 with elimination of ammonia and the resulting N-substituted .beta.-carboxylic acid amides are converted into the desired N-substituted acrylamides at elevated temperatures by splitting out of water. The conversion of the N-substituted acrylamides with splitting out of water is preferably effected in the presence o…