The invention provides compounds of Formula (I)and pharmaceutically acceptable salts thereof. The Formula (I) imidazopyridazines inhibit protein kinase activity thereby making them useful as anticancer agents.本發明提供式(I)化合物及其醫藥學上可接受之鹽。式(I)咪唑并嗒抑制蛋白激酶活性,從而適用作抗癌劑。