Leflunomide

Leflunomide

Synonyms: LEFLUNOMIDE;HWA 486;ALPHA,ALPHA,ALPHA-TRIFLUORO-5-METHYL-4-ISOXAZOLECARBOXY-P-TOLUIDIDE;5-METHYLISOXAZOLE-4-(4-TRIFLUOROMETHYLCARBOXANILIDE);5-METHYL-N-[4-(TRIFLUOROMETHYL)PHENYL]-4-ISOXAZOLECARBOXAMIDE;N-(4-TRIFLUOROMETHYLPHENYL)-5-METHYLISOXAZOL-4-CARBOXAMIDE;5-methylisoxazole-4-carboxylicacid(4-trifluoromethyl)anilide;5-methyl-n-(4-(trifluoromethyl)phenyl)-4-isoxazolecarboxamid CAS: 75706-12-6 MF: C12H9F3N2O2 MW: 270.21

Chemical Properties Off White Crystalline Solid Usage An immunosuppressive. Inhibits T and B cell proliferation. Activity is attributed mainly to its metabolite, a malononitrile derivative, which is beleived to inhibit dihydroorotate dehydrogenase as well as several protein tyrosine kinases.

Therapeutical Usage vasodilator Usage anti-Altzheimer therapeutic Biological Activity Immunosuppressant agent. In vitro the active metabolite A77 1726 (RS-61980) inhibits dihydroorotate dehydrogenase (K i = 2.7 μ M) and de novo pyrimidine synthesis in T-cells; blocks lymphocyte cell cycle progression and proliferation.

A77 1726 also inhibits anti-CD3/CD28-induced cytokine production in PBMC cells (IC 50 = 21-27 μ g/ml). In vivo reduces inflammation in several animal models of autoimmune disease, arthritis, asthma and graft rejection.