Preparation of N-alkyl- and N,N-dialkyldiaminoethanes

US5158974A · kind A · utility

Assignee

• BASF SE

Inventors

• Andreas Hohmann · Ludwigshafen, DE
• Wolfgang Reuther · Neckargemünd, DE
• Werner Bochnitschek · Ludwigshafen, DE

Key dates

• Filing date: Oct 15, 1990
• Grant date: Oct 27, 1992
• Expiry date: Oct 15, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is described for the preparation of an N-alkyl- or N,N-dialkyl-1,2-diaminoethane of the general formula I ##STR1## where R.sup.1 is hydrogen or methyl, R.sup.2 is C.sub.1 - to C.sub.5 -alkyl, and R.sup.3 is hydrogen or C.sub.1 - to C.sub.5 -alkyl, with the proviso that the total number of carbon atoms in R.sup.2 and R.sup.3 is an integer from 1 to 6, by reacting an imine of the general formula II ##STR2## with an amine of the general formula III ##STR3## where R.sup.1, R.sup.2 and R.sup.3 are as defined above, which comprises carrying out the reaction in the presence of carbon dioxide at from 10.degree. to 150.degree. C. and at from 0.5 to 50 bar.