Preparation of mono- and dibromo- or chloroaldehydes

Details Preparation of mono- and dibromo- or chloroaldehydes Preparation of mono- and dibromo- or chloroaldehydes

1983-04-22

1984-12-04

Lone, Werren B.

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

Organic compounds

Oxygen containing

C07C 4563, C07C 4714

Patent

active

044866089

ABSTRACT:
A process for making mono- and dichlorinated or brominated aldehydes from aldehydes having at least 3 carbon atoms and hydrogens alpha to the carbonyl group or primary alcohols having at least 3 carbon atoms and hydrogens in the 2-position by direct bromination or chlorination by carrying out the bromination or chlorination in an inert organic solvent with bromine or chlorine and containing a catalyst complex of HX and an N,N-dialkyl or cycloalkylformamide where X is a counterion.

REFERENCES:
patent: 2478741 (1949-08-01), Brothman
patent: 2697120 (1954-12-01), Gilbert
patent: 2702303 (1954-02-01), Otto
patent: 2863924 (1958-12-01), Pianfetti et al.
patent: 3240813 (1966-03-01), Dick
patent: 3636102 (1972-01-01), Lippman
Patai, "The Chemistry of Acyl Halides", Interscience Pub., NY, (1972), pp. 55-56.

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