5-chloro-6-methyl-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-4-ol 、
methyl 2-chloro-6-methyl-3-nitropyridine-4-carboxylate 在
4-二甲氨基吡啶 作用下,
以
四氢呋喃 为溶剂,
以92%的产率得到methyl 2-{[5-chloro-6-methyl-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-4-yl]oxy}-6-methyl-3-nitropyridine-4-carboxylate