反应详情

温度

80 °C

A mixture of 3-{(S)-1-[(R)-1-(4-Methoxy-phenyl)-ethyl]-pyrrolidin-2-yl}-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-pyridine 4 (crude, 6.93 mmole), 3-bromo-indole-1-carboxylic acid tert-butyl ester (2.46 g, 8.32 mmole), Na2CO3 (35 mL, 35 mole, 1 M aqueous) in a mixed solution of 50 mL of toluene and 20 mL of ethanol was degased under vacuum. After heat at 80° C. for 1.5 hours, the reaction mixture was cooled to room temperature and dilutied with 150 mL of EtOAc, and washed by 2×100 mL of water. The organic layer was filtered and concentrated. The crude producte was purified by flash chromatography (Hexane 70%, EtOAc 30%) to give 3-(5-{(S)-1-[1-(4-Methoxy-phenyl)-ethyl]-pyrrolidin-2-yl}-pyridin-3-yl)-indole-1-carboxylic acid tert-butyl ester 5 (2.02 g, 59% in two steps) as light brown gum.

1. customwas degased under vacuum
2. temperaturethe reaction mixture was cooled to room temperature
3. washwashed by 2×100 mL of water
4. filtrationThe organic layer was filtered
5. concentrationconcentrated
6. customThe crude producte was purified by flash chromatography (Hexane 70%, EtOAc 30%)