The present invention relates to compounds represented by Formula 1 or a pharmaceutically acceptable salt thereof, wherein: R1 is chloro or methyl; R2 is hydrogen or chloro; R3 is hydrogen, fluoro, chloro, bromo, methyl, ethyl, isopropyl, pentyl, hexyl, octyl, methoxy, phenoxy, (4-nitrophenyl)sulfonyl, piperidin-4-yl, or piperazin-1-yl; R4 is hydrogen, chloro, methyl or trifluoromethyl, phenoxy, (4-nitrophenyl)sulfonyl or piperidin-4-yl; or R3 and R4, together with the carbons to which they are attached, form a fused ring selected form the group consisting of: n is 1 or 2. These compounds according to the present invention remarkably inhibits activity of DRAK that inhibits signal systems of TGF-β, which is known to suppress cancer growth, and thus the novel pyrimidine compounds can be used as a pharmaceutical composition for preventing or treating cancer and can be used as a pharmaceutical composition for preventing or treating inflammatory disease.