反应详情

温度

100 °C

Palladium tetrakistriphenylphosphine (204.6 mg, 0.177 mmol) was added to a stirred suspension of [(3R,3aR,6R,6aS)-3-(1-allyl-6-chloro-5-iodo-imidazo[4,5-b]pyridin-2-yl)oxy-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-6-yl]oxy-tert-butyl-dimethyl-silane (1.0083 g, 1.745 mmol), 4-bromophenylboronic acid (385.9 mg, 1.922 mmol), and tripotassium phosphate (1.1412 g, 5.38 mmol) in dioxane (14.0 ml) and water (3.5 ml). The reaction mixture was degassed (3×) and placed under nitrogen before being heated to 100° C. for 16 h. The reaction mixture was cooled to room temperature and partitioned between EtOAc (150 ml) and water (150 ml). The aqueous layer was extracted with EtOAc (2×75 ml). The organic layers were combined, washed with brine (1×75 ml), dried over MgSO4, filtered, and evaporated under reduced pressure to give a yellow foam. Flash chromatography of the foam utilizing a 80 g silica RediSep Rf® column and employing a 0-30% EtOAc/hexane gradient followed by 30% EtOAc/hexane afforded the title compound as a yellow foam. LC-MS: calculated for C27H33BrClN3O4Si 605.11, 607.11 observed m/e: 606.20, 608.16 (M+H)+ (Rt 1.47/2 min)

1. customThe reaction mixture was degassed (3×)
2. temperatureThe reaction mixture was cooled to room temperature
3. custompartitioned between EtOAc (150 ml) and water (150 ml)
4. extractionThe aqueous layer was extracted with EtOAc (2×75 ml)
5. washwashed with brine (1×75 ml)
6. dry with materialdried over MgSO4
7. filtrationfiltered
8. customevaporated under reduced pressure
9. customto give a yellow foam