反応 #1720885

反応方程式

5-Bromo-6-fluoro-1H-indole

1-chloro-4-iodobenzene

K2CO3

NaCl

→

5-Bromo-1-(4-chloro-phenyl)-6-fluoro-1H-indole

収率 60.4%

溶媒

NMP

反応条件

後処理

1. 1
   温度After cooling to room temperature
2. 2
   抽出extracted three times with Et2O
3. 3
   乾燥Drying of the combined organic layers with Na2SO4, evaporation of the solvent, and column chromatography on silica gel with CH2Cl2/hexane 1:2

実験手順

A mixture of 0.07 g (5 mmol) 5-Bromo-6-fluoro-1H-indole (1, 1-chloro-4-iodobenzene (2.5 g, 10.5 mmol), 250 mg (1.31 mmol) CuI, 80 mg (0.9 mmol) ZnO, and 1.75 g (12.67 mmol) K2CO3 in degassed NMP was stirred at 170° C. during 6 hours in a pressure tube. After cooling to room temperature, the mixture was poured into 50 ml of saturated aqueous NaCl and extracted three times with Et2O. Drying of the combined organic layers with Na2SO4, evaporation of the solvent, and column chromatography on silica gel with CH2Cl2/hexane 1:2 gave 0.98 g (60%) 5-Bromo-1-(4-chloro-phenyl)-6-fluoro-1H-indole as a yellowish-grey solid, MS: 323 (M, 1Cl, 1Br). (Analogously to Jens Perregaard et. al. J. Med. Chem. 1992, 35, 4813-4822.)

出典