反应 #531832

反应方程式

8-chloro-2-[3-chloro-1-(3-chloro-2-pyridinyl)-1H-pyrazol-5-yl]-6-cyano-4H-3,1-benzoxazin-4-one

cyanobenzoxazinone

8-chloro-2-[3-chloro-1-(3-chloro-2-pyridinyl)-1H-pyrazol-5-yl]-6-cyano-4H-3,1-benzoxazin-4-one

methylamine

→

title compound

3-chloro-1-(3-chloro-2-pyridinyl)-N-[2-chloro-4-cyano-6-[(methylamino)carbonyl]phenyl]-1H-pyrazole-5-carboxamide

溶剂

tetrahydrofuran

反应条件

后处理

1. 1
   其他The tetrahydrofuran solvent was evaporated under reduced pressure
2. 2
   其他the residual solid was purified by chromatography on silica gel

实验过程

To a solution of 8-chloro-2-[3-chloro-1-(3-chloro-2-pyridinyl)-1H-pyrazol-5-yl]-6-cyano-4H-3,1-benzoxazin-4-one (i.e. the cyanobenzoxazinone product of Step C) (187 mg, 0.446 mmol) in tetrahydrofuran (5 mL) was added dropwise methylamine (2.0 M solution in THF, 0.5 mL, 1.0 mmol) and the reaction mixture was stirred for 5 minutes, at which point thin layer chromatography on silica gel confirmed completion of the reaction. The tetrahydrofuran solvent was evaporated under reduced pressure, and the residual solid was purified by chromatography on silica gel to afford 49 mg of the title compound, a compound of the present invention, as a white solid that melted at 197-200° C.

来源