ethyl 3-{[2-(ethylamino)-5-fluoropyrimidin-4-yl]amino}-6,6-dimethyl-5,6-dihydropyrrolo[3,4-c]pyrazole-1(4H)-carboxylate trihydrochloride 、
4-fluoro-1-methyl-piperidine-4-carbonyl chloride 在
N,N-二异丙基乙胺 、
三乙胺 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 26.0h,
以47%的产率得到N
2-ethyl-5-fluoro-N
4-{5-[(4-fluoro-1-methylpiperidin-4-yl)carbonyl]-6,6-dimethyl-1,4,5,6-tetrahydropyrrolo[3,4-c]pyrazol-3-yl}pyrimidine-2,4-diamine