反応 #531832

反応方程式

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

溶媒

tetrahydrofuran

反応条件

後処理

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

実験手順

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.

出典