1-(Benzyloxy)-4-bromo-2-fluorobenzene → (R)-4-(benzyloxy)-N-(2-(tert-butyldimethylsilyloxy)propyl)-3-fluoroaniline

温度

120 °C

PdOAc2 (0.040 g, 0.18 mmol) and dicyclohexyl(2',4',6'-triisopropylbiphenyl-2-yl)phosphine (0.085 g, 0.18 mmol) were added in one portion to a degassed solution of 1-(benzyloxy)-4-bromo-2-fluorobenzene (0.500 g, 1.78 mmol), [Reactants] and cesium carbonate (0.869 g, 2.67 mmol) in toluene (15 mL) at 20°C in a microwave vial. The microwave vial was sealed and the reaction was heated to 120 °C for 12 hours in the microwave reactor and cooled to RT. The reaction mixture was diluted with EtOAc (50 mL), and washed sequentially with water (50 mL) and saturated brine (50 mL). The organic layer was filtered and dried over Na2SO4, filtered and evaporated to afford crude product. The crude product was taken up in DCM (20 mL) and an isoluble white solid EN04063-43-1 (401 mg) was filtered off (not product). The filtrate was evaporated and was purified by flash silica chromatography, elution gradient 0 to 30% EtOAc in isohexane. Pure fractions were evaporated to dryness to afford (R)-4-(benzyloxy)-N-(2-(tert-butyldimethylsilyloxy)propyl)-3-fluoroaniline (0.482 g, 69.6 %) as a yellow oil.

ORDレコード

ord-3b6fe99cd0a6495daf0c56d94f8acbcc

出典データセット

750 AstraZeneca ELN dataset

元リンク

出典を表示