A process for preparing an esteramide compound of following formula: R 1 OOC-A-CONR 2 R 3 comprising a reaction step between: a diester compound of following formula: R 1 OOC-A-COOR 1 and an amine of following formula: HNR 2 R 3 in the presence of a basic compound, formulae in which: - A is a covalent bond or a linear or branched divalent alkylene group comprising a number of carbon atoms ranging from 1 to 12, - R 1 is an optionally substituted hydrocarbon group, comprising from 1 to 36 carbon atoms, - R 2 and R 3, the same or different, are groups chosen from the hydrogen atom and the hydrocarbon groups, optionally substituted, comprising from 1 to 36 carbon atoms, - R 2 and R 3 being able together to form a ring comprising the nitrogen atom with which they are linked, the said ring possibly being substituted and/or comprising an additional heteroatom, and - R 2 and R 3 not simultaneously being hydrogen atoms, characterized by the fact that: - the amine is dissolved in an organic solvent or in the diester compound, - when the amine is dissolved in an organic solvent, the diester compound is added to the reaction mixture comprising the amine and the basic compound, - when the amine is dissolved in the diester compound, the basic compound is added to the reaction mixture comprising the amine and the diester compound, - the reaction is conducted at a temperature of between 30°C and 130°C, - the amine is present in a molar excess relative to the diester compound ranging from 0.01 to 50 %. a diester compound of following formula: R 1 OOC-A-COOR 1 and an amine of following formula: HNR 2 R 3 in the presence of a basic compound, formulae in which: - A is a covalent bond or a linear or branched divalent alkylene group comprising a number of carbon atoms ranging from 1 to 12, - R 1 is an optionally substituted hydrocarbon group, comprising from 1 to 36 carbon atoms, - R 2 and R 3, the same or different, are groups chosen from the hydrogen atom and the hydrocarbon groups, optionally substituted, comprising from 1 to 36 carbon atoms, - R 2 and R 3 being able together to form a ring comprising the nitrogen atom with which they are linked, the said ring possibly being substituted and/or comprising an additional heteroatom, and - R 2 and R 3 not simultaneously being hydrogen atoms, - A is a covalent bond or a linear or branched divalent alkylene group comprising a number of carbon atoms ranging from 1 to 12, - R 1 is an optionally substituted hydrocarbon group, comprising from 1 to 36 carbon atoms, - R 2 and R 3, the same or different, are groups chosen from the hydrogen atom and the hydrocarbon groups, optionally substituted, comprising from 1 to 36 carbon atoms, - R 2 and R 3 being able together to form a ring comprising the nitrogen atom with which they are linked, the said ring possibly being substituted and/or comprising an additional heteroatom, and - R 2 and R 3 not simultaneously being hydrogen atoms, - the amine is dissolved in an organic solvent or in the diester compound, - when the amine is dissolved in an organic solvent, the diester compound is added to the reaction mixture comprising the amine and the basic compound, - when the amine is dissolved in the diester compound, the basic compound is added to the reaction mixture comprising the amine and the diester compound, - the reaction is conducted at a temperature of between 30°C and 130°C, - the amine is present in a molar excess relative to the diester compound ranging from 0.01 to 50 %.