The invention relates to a process for the preparation of compounds of formula (1) and to intermediates used in the process, wherein the substituents X 1 , X, Y, Z, R 1 , R 2 and R 3 have the meaning as set forth and explained in the description of the invention.本發明係關於式(I)化合物其中取代基X1,R1,R2,R3及R4均具有如本發明說明文中所敘述與闡釋之意義,製備此等化合物之方法,含有彼等之醫藥組合物,其視情況併用一或多種其他醫藥活性化合物以治療對蛋白質激酶活性之抑制有回應之疾病之用途,及治療此種疾病之方法。