PEPTIDE DERIVATIVES, METHOD OF THEIR SYNTHESIS, PHARMACEUTICAL COMPOSITION INHIBITING HUMAN LEUKOCYTE ELASTASE ACTIVITY Russian patent published in 1996 - IPC

FIELD: organic chemistry. SUBSTANCE: products: peptide derivatives of the formula (I). Synthesis is carried out by oxidation of peptide derivative of the formula (II) followed by if necessary sulfoamination of compound where R₃ - carboxy- or ester-group, conversion of carboxylic acid ester-group to the corresponding carboxy-group by hydrolysis. Pharmaceutical composition inhibiting human leukocyte elastase activity has derivatives of peptide (I) as an active substance at the dose 100-250 mg per unit and pharmaceutically acceptable carrier. Structure of compounds of the formulas (I) and (II) is given in description text. Synthesized compounds were used in pharmacology. EFFECT: improved method of synthesis. 4 cl, 2 tbl