3-[8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-ylamino]-N-hydroxypropionamidine 、
[(2-ethylcyclohexan-1-ol)yl] chloroformate 在
吡啶 作用下,
以
xylene 为溶剂,
反应 20.0h,
以28%的产率得到8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[2-(5-oxo-4,5-dihydro-[1,2,4]-oxadiazol-3-yl)ethylamino]-8H-pyrido[2,3-d]pyrimidin-7-one