反应详情

(2R,4R)-2-(4-Bromo-2-fluoro-phenylcarbamoyl)-4-(tert-butyl-dimethyl-silanyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester (0.95 g, 1.84 mmol), 2-(methylthio)benzene boronic acid (0.37 g, 2.2 mmol), and tetrabutylammonium bromide (30 mg, 0.09 mmol) were combined in 15 mL toluene, added 2 mL of a 2M aqueous Na2CO3 solution followed by tetrakistriphenylphosphine palladium(0) (0.11 g, 0.09 mmol). Heated reaction at reflux for 5 hours, cooled, dissolved in EtOAc (100 mL), washed with water (3×50 mL), brine (50 mL), dried with MgSO4, filtered, and concentrated. Purified on a silica gel column eluted using an automated system with gradient of 0-60% EtOAc in hexanes over 40 minutes. Combined and concentrated pure fractions to yield title compound as a light yellow foam. (0.77 g, 74%) APCI (AP−): 559.3 (M−H)−.

1. temperatureHeated
2. customreaction
3. temperatureat reflux for 5 hours
4. temperaturecooled
5. washwashed with water (3×50 mL), brine (50 mL)
6. dry with materialdried with MgSO4
7. filtrationfiltered
8. concentrationconcentrated
9. customPurified on a silica gel column
10. washeluted
11. customover 40 minutes
12. concentrationconcentrated pure fractions