Preparation of carbonyl halides of more than 7 carbon atoms
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United States of America Patent
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Feb 13, 1990
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N/A
app pub date -
Jun 10, 1988
filing date -
Jun 12, 1987
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Expired
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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.
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