ANTIMALARIAL AMINOQUINOLINE DERIVATIVES, METHOD FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITION CONTAINING THEM

New quinoline derivatives containing a free amine functional group and having antimalarial properties, especially new primaquine derivatives or their addition salts with acids. According to the invention these new derivatives are denoted schematically by the formula: PQ-X in which PQ denotes quinolines containing a free amine functional group and having antimalarial properties, especially primaquine; X denotes an amino acid or a peptide of 2 to 4 amino acids; and the bond PQ-X being a covalent peptide bond between the free amine group of PQ and the carboxylic group of X, the amino acid or the first amino acid of the peptide bonded to PQ being chosen from natural amino acids or their derivatives other than L-leucine. The invention also relates to a pharmaceutical composition which contains the new derivatives or their pharmaceutically acceptable salts as active principle.