3-cyano-4-(4-{2-[1-(2-hydroxy-ethylcarbamoyl)-1-methyl-ethoxy]-phenoxy}-phenylamino)-5-methyl-pyrrolo[1,2-b]pyridazine-6-carboxylic acid 、
N,N-二异丙基乙胺 、
叔丁基二甲基氯硅烷 、
sodium hydroxide 在
4-二甲氨基吡啶 氩 作用下,
以
四氢呋喃 为溶剂,
反应 3.0h,
以gave 433G (75 mg, 38%) as a yellow oil的产率得到4-[4-(2-{1-[2-(tert-butyl-dimethyl-silanyloxy)-ethylcarbamoyl]-1-methyl-ethoxy}-phenoxy)-phenylamino]-3-cyano-5-methyl-pyrrolo[1,2-b]pyridazine-6-carboxylic acid