Preparation of N-aminopyridones

US5466812A · kind A · utility

Assignee

• BASF SE

Inventors

• Stefan Beckmann · Mannheim, DE
• Ernst Schefczik

Key dates

• Filing date: Jun 7, 1994
• Grant date: Nov 14, 1995
• Expiry date: Jun 7, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/89
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing pyridones of the formula I ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.7 -cycloalkyl, C.sub.3 -C.sub.4 -alkenyl or substituted or unsubstituted phenyl, R.sup.2 is cyano, carbamoyl, carboxyl, C.sub.1 -C.sub.6 -alkoxycarbonyl, substituted or unsubstituted C.sub.1 -C.sub.6 -alkanoyl, substituted or unsubstituted benzoyl, halogen or nitro, R.sup.3 is hydrogen, and R.sup.4 is substituted or unsubstituted C.sub.1 -C.sub.12 -alkanoyl, C.sub.1 -C.sub.12 -alkoxycarbonyl, substituted carbamoyl, substituted or unsubstituted C.sub.1 -C.sub.12 -alkylsulfonyl, C.sub.5 -C.sub.7 -cycloalkylsulfonyl, substituted or unsubstituted arylsulfonyl or hetarylsulfonyl, substituted or unsubstituted arylcarbonyl or hetarylcarbonyl, or R.sup.3 and R.sup.4 together with the nitrogen atom joining them together are a heterocyclic radical, comprises reacting the carbonyl compounds of the formulae II and III ##STR2## where Y is oxygen or imino and one of the radicals X.sup.1 and X.sup.2 is a radical of the formula NH--NR.sup.3 R.sup.4 and the other is C.sub.1 -C.sub.6 -alkoxy, and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each as defined above, in a diluent i…