Joint preparation of 3-dialkylaminopropionitriles, bis-(2-cyanoethyl) ether and, if desired, ethylene-cyanohydrin

US4965362A · kind A · utility

Inventors

• Franz Merger · Bischofswerda, DE
• Wolfgang Harder · Weinheim, DE
• Peter Hettinger · Haus Ferring, DE
• Claus-Ulrich Priester · Ludwigshafen, DE
• Dieter Franz · Ludwigshafen, DE
• Dieter Voges

Key dates

• Filing date: Jul 6, 1989
• Grant date: Oct 23, 1990
• Expiry date: Jul 6, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C255/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

3-Dialkylaminopropionitriles ##STR1## where R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.4 -alkyl which may furthermore be bonded to form a 5-membered or 6-membered ring, bis-(2-cyanoethyl) ether II EQU NC--CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CH.sub.2 --CN II and, if desired, ethylenecyanohydrin III EQU HO--CH.sub.2 --CH.sub.2 --CN III are prepared jointly by a process in which PA1 (a) acrylonitrile and water are reacted in the presence of a base at from 60.degree. to 150.degree. C. to give a mixture of acrylonitrile, water and bis-(2-cyanoethyl) ether II, the base being a mineral base, a quaternary nitrogen base or a mixture of these, PA1 (b) this mixture is reacted at about 0.degree.-50.degree. C. with a dialkylamine of the general formula IV ##STR2## to give a mixture of water, a dialkylaminopropionitrile I and bis-(2-cyanoethyl) ether II, and this mixture is separated into its components and PA1 (c) if desired, the ether II obtained in proces stage (b) or an aqueous solution of this ether and/or the reacted mixtures containing this ether and obtained from process stage (a) or (b) is allowed to react at from 50.degree. to 150.degree. C. with the dialkylamine IV to give a mixture …