Preparation of mono and dibromo or mono and dichloro aldehydes and acid chlorides.

摘要

A process for making mono- and dichlorinated or brominated aldehydes and acid chlorides from aldehydes having hydrogens alpha to the carbonyl group or primary alcohols having hydrogens in the 2-position by direct bromination or chlorination by carrying out the bromination or chlorination in an inert organic solvent saturated with bromine or chlorine and containing a catalyst complex of hydrogen chloride and an N,N-dialkyl or cycloalkylformamide.