| abstract |
Process for preparing urea derivatives, useful as anisolytic and antiaggressive agents, of the general formula: ** (Formula) ** in which R1, R2 and R3, which are the same or different, each represent an alkyl, alkenyl or alkynyl radical straight or branched chain, with 1 to 5 carbon atoms, R1, R2 and R3 being such that: a) only one of these radicals can represent an alkenyl or alkynyl group that has an unsaturated bond in the alpha, beta position with respect to the methylurea radical, in this case each of the other two substituents representing an alkyl radical; b) the sum of its carbon atoms is never less than 4; characterized in that a methylamine derivative is heated. |