반응 #41631

반응 방정식

1-(t-butoxycarbonyl)pyrrole-2-boronic acid

sodium carbonate

water

4-bromo-3-fluoro-phenylamine

→

compound

t-butyl 2-(4-amino-2-fluoro-phenyl)-pyrrole-1-carboxylate

용매

dimethoxyethane

반응 조건

후처리

1. 1
   기타the reaction liquid
2. 2
   온도After cooled
3. 3
   기타the reaction liquid
4. 4
   여과was filtered through Celite
5. 5
   workup.ADDITIONthe filtrate was diluted with ethyl acetate
6. 6
   세척washed with water and saturated saline in order
7. 7
   건조dried with anhydrous magnesium sulfate
8. 8
   기타The solvent was evaporated away under reduced pressure
9. 9
   기타the resulting residue was purified through silica gel column chromatography (developing solvent: hexane/ethyl acetate=2/1)

실험 절차

1.6 g of 1-(t-butoxycarbonyl)pyrrole-2-boronic acid, 200 mg of tetrakistriphenylphosphine palladium, 5 ml of aqueous saturated sodium carbonate solution and 5 ml of water were added in order to a dimethoxyethane (10 ml) solution of 1 g of 4-bromo-3-fluoro-phenylamine, and the reaction liquid was stirred in a nitrogen atmosphere at 70° C. for 3 hours. After cooled, the reaction liquid was filtered through Celite, and the filtrate was diluted with ethyl acetate, washed with water and saturated saline in order, and dried with anhydrous magnesium sulfate. The solvent was evaporated away under reduced pressure, and the resulting residue was purified through silica gel column chromatography (developing solvent: hexane/ethyl acetate=2/1) to obtain the entitled compound as a pale brown solid.

출처