Preparation of carbonyl halides of more than 7 carbon atoms

US4900479A · kind A · utility

Assignee

• BASF SE

Inventors

• Enrique Freudenberg · Schifferstadt, DE
• Peter Wittmer · Bischofswerda, DE
• Andreas Hohmann · Ludwigshafen, DE
• Hans-Heinrich Bechtolsheimer · Dittelsheim-Heßloch, DE

Key dates

• Filing date: Jun 10, 1988
• Grant date: Feb 13, 1990
• Expiry date: Jun 10, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Carbonyl halides of the general formula I ##STR1## where R is an organic radical of more than 7 carbon atoms and X is chlorine or bromine, are prepared by reacting carboxylic acids of the general formula II ##STR2## where R has the abovementioned meaning, with phosphorus chlorides or bromides by treating these reaction mixtures with carboxamide/hydrochloride or hydrobromide mixtures which are not homogeneously miscible with the carbonyl halides I and then separating off the carboxamide hydrochloride or hydrobromide phase.