Process for preparing esteramide compounds

A method for preparing an esteramide compound of the following formula (I):

• R1OOC-A-CONR2R3 (I)
• comprising a step for reaction between:
• a diester compound of the following formula (II):
• R1OOC-A-COOR1 (II)
• and an amine of the following formula (III):
• HNR2R3 (III)
• in the presence of a basic compound,
• wherein:
• A is a covalent bond or a linear or branched divalent alkylene group comprising a number of carbon atoms ranging from 1 to 12,
• R1 is an optionally substituted hydrocarbon group, comprising from 1 to 36 carbon atoms,
• R2 and R3, either identical or different, are optionally substituted alkyl groups, comprising from 1 to 36 carbon atoms, and
• R2 and R3 not being simultaneously hydrogen atoms,
• characterized by the fact that
• the amine (III) is solubilized in an organic solvent, or in the diester compound (II),
• when the amine (III) is solubilized in an organic solvent, the diester compound (II) is added onto the reaction mixture comprising the amine (III) and the basic compound,
• when the amine (III) is solubilized in the diester compound (II), the basic compound is added onto the reaction mixture comprising the amine (III) and the diester compound (II),
• the reaction is conducted at a temperature greater than or equal to 30° C.,
• the amine (III) is present in molar excess ranging from 0.01 to 50%, based on the diester compound (II).