Patent ID: 6982315

Claim:
A process for the preparation of carboxamides from an acid component in the form of a compound having at least one carboxyl groups and an amine component in the form of a compound having at least one primary or secondary amino group, comprising the following steps: i) introducing the amine component into a solvent together with a coupling base in the form of a sterically hindered trialkyl amine, ii) adding the acid component to a solvent with an activating reagent in the form of a carbonate of the formula I, O═C(—OX) 2 (I) which contains the two identical or different electron-withdrawing groups X which are separate or connected to one another, or its monohalide of the formula II, O═C(—OX)Y (II) in which X has the same meaning as in formula I and Y represents a halogen atom, or its dihalide of the formula III, O═CYY′ (III) in which Y and Y′ independently of one another each represent a halogen atom, and an activating base in the form of a sterically hindered momo- or polyalkyl-substituted pyridine and (iii) adding the mixture containing the acid component as in (ii) to the mixture containing the amino component as in (i).