Preparation of acyl chlorides

Details Preparation of acyl chlorides Preparation of acyl chlorides

1991-06-24

1992-11-24

Cintins, Marianne M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic halides

562861, 562866, C07C 51363

Patent

active

051664275

ABSTRACT:
Acyl chlorides of the general formula ##STR1## where R is C.sub.8 -C.sub.30 -alkyl, C.sub.8 -C.sub.30 -alkenyl or C.sub.8 -C.sub.30 -alkynyl, are prepared from a carboxylic acid of the general formula II ##STR2## where R has the abovementioned meanings, and phosgene, COCl.sub.2 (III), in the presence of a catalyst adduct of phosgene and N,N-dialkylformamide of the general formula IV ##STR3## where R.sup.1 and R.sup.2 independently of one another are each C.sub.1 -C.sub.3 -alkyl, preferably a 1:1 adduct in excess N,N-dialkylformamide, the reaction product I being obtained by phase separation, by a process in which II and III are used in essentially equimolar amounts and the phase containing the catalyst adduct is reused.

REFERENCES:
patent: 3149155 (1964-09-01), Seefelder
patent: 3547960 (1970-12-01), Hauser
patent: 3857841 (1974-12-01), Keil
patent: 4900479 (1990-02-01), Freudenberg et al.
Chem. Abstracts vol. 105, 133526, p. 637, Stammann et al., (1986).
Chem. Abstracts vol. 97, 197862, p. 544, Blank et al., (1982).
Chem. Abstracts, vol. 95, 97116, Decker et al., (1980).

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