Preparation of asymmetrically substituted triazines

US5739328A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernd Schafer · Kipfenberg, DE
• Horst Mayer · Ludwigshafen, DE

Key dates

• Filing date: Mar 29, 1996
• Grant date: Apr 14, 1998
• Expiry date: Mar 29, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D251/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing asymmetrically substituted triazines of the formula I ##STR1## where R.sup.1 is hydrogen, methyl or ethyl, R.sup.2 and R.sup.3 independently of one another are an unsubstituted or substituted hydrocarbon radical, by reaction of a cyanoguanidine of the formula II ##STR2## with a carboxylic acid derivative in the presence of an alcohol of the formula III EQU R.sup.2 --OH III, which comprises reacting a carboxylic acid ester of the formula IV EQU R.sup.3 --COOR.sup.4 IV, where R.sup.3 has the abovementioned meaning and R.sup.4 is an unsubstituted or substituted hydrocarbon radical, in the presence of a base or of a carboxamide selected from the group consisting of N,N-dialkylformamide, N,N-dialkylacetamide and N-methylpyrrolidone and in the presence of a salt or of a salt-like compound of the elements magnesium, calcium, aluminum, zinc, copper, iron, cobalt, nickel or chromium, is described.