Process for preparing acid chlorides
OwnerAntonio Luis Palomo Collinventor
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Abstract
A process for preparing acid chlorides, wherein a silyl ester having an aliphatic, aromatic, alkanoaromatic or heterocyclic group which may support substituents, and having a low molecular weight alkyl or phenyl group is reacted with thionyl chloride in an inert solvent at a temperature of from -15.degree. to 50.degree. C, preferably from 10.degree. to 50.degree. C.
Claims6
A process for the preparation of acid chlorides, wherein there is used a silyl ester of the following general formula:
- ##STR2## where R is a substituted or unsubstituted aralkyl, aliphatic, aromatic, or heterocyclic group provided that the substituent is not an amino group, and R.sub.1, R.sub.2 and R.sub.3 are alkyl of 1-3 carbon atoms or phenyl, which is reacted with thionyl chloride in an inert solvent at a temperature of from -15.degree. to 50.degree. C to obtain a compound of the general formula:
- R--COCl
- where R has the same meaning as given above.
A process for the preparation of acid chlorides, wherein an acid trimethylsilyl ester is reacted in a solvent with thionyl chloride at a temperature of between 10.degree. and 50.degree. C.
A process for preparing .alpha.-chlorophenylacetyl chloride which comprises reacting .alpha.-chlorophenylacetic acid silyl ester with thionyl chloride in an inert solvent at about 20.degree. C.
Dependencies are inferred from the claim text.