反応 #725876

反応方程式

EtOH

N-toluenesulfonyl-2-(4-(trifluoroacetylamino)benzoyl)pyrrole

KOH

→

2-(4-aminobenzoyl)pyrrole

収率 94.0%

溶媒

EtOAc

反応条件

後処理

1. 1
   温度the mixture was heated
2. 2
   温度at reflux until thin layer chromatography (TLC) analysis
3. 3
   その他the mixture was evaporated to dryness
4. 4
   その他The crude product was purified by column chromatography (SiO2, EtOAc:Hexanes)

実験手順

To a stirred EtOH (4 mL) solution containing N-toluenesulfonyl-2-(4-(trifluoroacetylamino)benzoyl)pyrrole (0.500 g, 1.15 mmol), was added 40% KOH solution (2 mL) and the mixture was heated at reflux until thin layer chromatography (TLC) analysis showed complete conversion of the starting material. The resulting solution was cooled to room temperature and diluted with EtOAc (20 mL), and the mixture was evaporated to dryness. The crude product was purified by column chromatography (SiO2, EtOAc:Hexanes) to afford the purified product 2-(4-aminobenzoyl)pyrrole (196 mg, 94% yield). 1H NMR (400 MHz, CD2Cl2, 25° C.) δ4.19 (bs, 2H), 6.33 (m, 1H), 6.72 (d, 2H), 6.88 (m, 1H), 7.10 (m, 1H), 7.82 (d, 2H), 9.90 (bs, 1H); 13C NMR (100 MHz, CD2Cl2, 25° C.) δ110.9, 114.2, 118.0, 124.5, 128.5, 131.8, 131.9, 151.3, 183.5; HRMS (EI): m/z 186.0793 (100) {M}+.

出典