Method for producing long-chain glycine-N,N-diacetic acid derivatives

US6307086A · kind A · utility

Assignee

• BASF SE

Inventors

• Rainer Rahm · Ludwigshafen, DE
• Thomas Greindl · Bad Dürkheim, DE
• Alfred Oftring · Bad Dürkheim, DE
• Guenter Oetter · Bischofswerda, DE
• Juergen Detering · Schifferstadt, DE
• Gerold Braun · Ludwigshafen, DE

Key dates

• Filing date: Mar 21, 2000
• Grant date: Oct 23, 2001
• Expiry date: Mar 21, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C255/25
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing compounds of the formula IIb ##STR1## PA0 where R is C.sub.6 -C.sub.30 -alkyl or C.sub.6 -C.sub.30 -alkenyl, which may additionally have upto 5 hydroxyl groups, formyl groups, C.sub.1 -C.sub.4 -alkoxy groups, phenoxy groups or C.sub.1 -C.sub.4 -alkoxycarbonyl groups as substituents and may be interrupted by upto 5 nonadjacent oxygen atoms, or alkoxylate groups of the formula --(CH.sub.2).sub.k --O--(A.sup.1 O).sub.m --(A.sup.2 O).sub.n --Y where A.sup.1 and A.sup.2 are, independently of one another, 1,2-alkylene groups having 2 to 4 carbon atoms, Y is hydrogen, C.sub.1 -C.sub.12 -alkyl, phenyl or C.sub.1 -C.sub.4 -alkoxycarbonyl, and k is 1, 2 or 3, and m and n are each numbers from 0 to 50, and the total of m+n must be at least 4, by reacting iminodiacetonitrile with aldehydes of the formula R--CHO and HCN or alkali metal cyanides, the process being carried out PA0 a) in the absence of an organic solvent and in the presence of a Lewis or Bronsted acid, or PA0 b) in the presence or absence of an organic solvent and in the presence of an emulsifier, or PA0 c) in the presence or absence of an organic solvent and under a pressure in the range from 1 to 40 bar.