Abstract: An N-alkylated formamide of the formula ##STR1## wherein R.sup.1 denotes alkylR.sup.2 denotes alkyl with at least 9 carbon atoms or the group ##STR2## wherein A denotes straight-chain or branched alkanediyl,R.sup.1 denotes lower alkyl andn denotes an integer from 2 to 6,a process for the preparation of the same and its use in the replacement of a hydroxyl group in an organic compound by chlorine or bromine the improvement wherein the replacement is carried out in the presence of an N-alkylated formamide.

Abstract: The instant invention is directed to a process for the production of an aromatic isocyanate containing aromatically bound sulfochloride groups, comprising:(I) reacting(a) an isocyanate or carbamic acid chloride which contains at least one aromatically bound isocyanate group and/or at least one aromatically bound carbamic acid chloride group, successively or simultaneously at 0.degree. to 170.degree. C. with(b) a sulfonating agent and(c) an organic compound containing at least one aromatically bound trihalo methyl group and(II) removing hydrogen chloride from the reaction mixture at 20.degree. to 170.degree. C.

Abstract: A process for the simultaneous preparation of an aromatic sulphonic acid halide and an aromatic carboxylic acid halide or the corresponding carboxylic acid is disclosed wherein an aromatic sulphonic acid or acid anhydride is reacted with an aromatic trihalogenomethyl compound in the presence of a Bronsted acid or Lewis acid at a temperature of 20.degree. to 300.degree. C., if appropriate in the presence of a solvent. Generally, at least half an equivalent of aromatic trihalogenomethyl compound is employed per equivalent of sulphonic acid.