4-amino-1, 2, 5 - oxadiazole-3-carboximidamide derivatives and their use in inhibiting indoleamine 2, 3 - dioxygenase and the preparation of a medicament for treatment of cancer, viral infections, depression, neurodegenerative disorders, trauma, age-related cataracts, organ transplant rejection and autoimmune diseases

摘要

The present invention is directed to processes for the preparation of 1,2,5-oxadiazole derivatives of formula F15 as well as intermediates thereof and their preparation processes.