Process for the preparation of acid chlorides by phosgenation of

Details Process for the preparation of acid chlorides by phosgenation of Process for the preparation of acid chlorides by phosgenation of

1986-07-23

1989-02-21

Killos, Paul J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260544Y, 502150, 502152, 502167, C07C 5160

Patent

active

048062863

ABSTRACT:
The invention relates to a new process for the preparation of carboxylic acid chlorides by phosgenation of the corresponding carboxylic acid in the presence of a catalyst.
This process is characterized in that the said catalyst is chosen from the compounds represented by the formulae ##STR1## in which R.sub.1 to R.sub.6, which are identical of different, denote: aliphatic, alicyclic, araliphatic or aromatic radicals,
or form, in pairs, with the nitrogen atom to which they are attached or with the N-C-N group, a 5- or 6-membered heterocyclic ring.
The process applies to most carboxylic acids.
The acid chlorides obtained are known and used to produce radical polymerization initiators or pesticides.

REFERENCES:
patent: 3149155 (1964-09-01), Seefelder et al.
patent: 3547960 (1970-12-01), Hauser
patent: 3932451 (1976-01-01), Bigelow et al.

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