NOVEL 2,4-DIFLUOROBENZAMIDE DERIVATIVES

摘要

PURPOSE: Provided are novel 2,4-difluorobenzamide derivatives which are excellent in inhibition of the growth of both HBV and HCV, and thus used as prevention and treatment agents for HBV hepatitis and HCV hepatitis. also, provided are their pharmaceutically acceptable salts and their manufacturing method. CONSTITUTION: The 2,4-difluorobenzamide derivative is represented by the formula(1), wherein R1 is C1-C4 linear or branched alkyl group, hydroxy group, a C2-C6 alkylamino group, a 4-sulfamoylphenyl group, or a saturated or unsaturated 5 or 6 membered hetero cycle having 1-2 of hetero atoms selected from N, O and S; R2 is H or a C1-C3 linear or branched alkyl group; or R1 and R2 are bound together with 1-2 of hetero atoms selected from N, O and S to form a saturated or unsaturated 5, 6 or 7 membered hetero cycle, wherein the hetero cycle is a C1-C4 linear or branched alkyl group, or substituted or unsubstituted with a C1-C3 hydroxyalkyl group; and R3 is a 5-indazolyl group; and n is an integer of 0-4.