反应详情

温度

0 °C

To a suspension of zinc (322 mg, 4.92 mmol) in dry THF (770 μl) in a dry flask under argon was added 1,2-dibromoethane (10.6 μl, 0.123 mmol). The mixture was heated three times to reflux with a heat-gun. After 5 min the flask was placed in an ice bath and a solution of 3-fluoro-2-methyl-benzylbromide (500 mg, 2.46 mmol) in dry THF (1.5 ml) was added slowly, so that the temperature remained at 0° C. The mixture was stirred at 0° C. for 3 h. The cooled suspension was added dropwise to a precooled solution (−78° C.) of B-OM-9-BBN (2.45 ml, 2.45 mmol, 1 M in hexane). The mixture was then stirred at room temperature for 30 min. DMF (7 ml) was added, followed by the compound of step 5 (115 mg, 245 μmol), palladium(II) acetate (5.49 mg, 24.5 μmol) and S—PHOS (20.1 mg, 48.9 μmol). The reaction mixture was stirred at 100° C. for 2 h. The cooled mixture was quenched with water and extracted with EA. The organic layer was separated, dried over sodium sulfate, filtered, and evaporated under reduced pressure. The residue was purified by preparative HPLC. The eluate was lyophilized overnight to give 72 mg of the title compound.

1. temperatureThe mixture was heated three times
2. temperatureto reflux with a heat-gun
3. customremained at 0° C
4. stirringThe mixture was then stirred at room temperature for 30 min
5. stirringThe reaction mixture was stirred at 100° C. for 2 h
6. customThe cooled mixture was quenched with water
7. extractionextracted with EA
8. customThe organic layer was separated
9. dry with materialdried over sodium sulfate
10. filtrationfiltered
11. customevaporated under reduced pressure
12. customThe residue was purified by preparative HPLC
13. waitThe eluate was lyophilized overnight