反応 #424025

反応方程式

tert-butyl 4-(4-(3(tert-butoxycarbonylamino)-5-cyano-6-(2-fluoro-4-methoxyphenyl)-4,7-dihydro-1H-pyrazolo[3,4-b]pyridin-4-yl)phenyl)piperazine-1-carboxylate

→

tert-butyl 4-(4-(3-(tert-butoxycarbonylamino)-5-cyano-6-(2-fluoro-4-methoxyphenyl)-1H-pyrazolo[3,4-b]pyridin-4-yl)phenyl)piperazine-1-carboxylate

収率 97.5%

溶媒

dichloromethane

反応条件

後処理

1. 1
   その他The reaction mixture is sonicated for 5 min
2. 2
   ろ過It is filtered on silica (cyclohexane/ethyl acetate eluent: 5:5)

実験手順

To 2.22 g (3.44 mmol) of tert-butyl 4-(4-(3(tert-butoxycarbonylamino)-5-cyano-6-(2-fluoro-4-methoxyphenyl)-4,7-dihydro-1H-pyrazolo[3,4-b]pyridin-4-yl)phenyl)piperazine-1-carboxylate in solution in 20 ml of dichloromethane are added 1.49 g (17.19 mmol) of manganese oxide. The reaction mixture is sonicated for 5 min then stirred at room temperature for 20 h. It is filtered on silica (cyclohexane/ethyl acetate eluent: 5:5) to yield 2.16 g (97%) of tert-butyl 4-(4-(3-(tert-butoxycarbonylamino)-5-cyano-6-(2-fluoro-4-methoxyphenyl)-1H-pyrazolo[3,4-b]pyridin-4-yl)phenyl)piperazine-1-carboxylate in the form of a yellow solid.

出典