反应详情

A mixture of 1-benzyl-2-bromo-5-chloro-1H-pyrrolo[3,2-b]pyridine (0.088 g, 0.27 mmol, from Step 2), 1-(tetrahydro-2H-pyran-2-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (0.084 g, 0.30 mmol, Aldrich) and Na2CO3 (0.14 g, 1.4 mmol) in 1,2-dimethoxyethane (3 mL) and water (0.5 mL) was degassed by a stream of nitrogen through the solution for 10 minutes. Tetrakis(triphenylphosphine)palladium(0) (0.032 g, 0.027 mmol, Strem) was added, the vial was capped and heated to reflux for 15 minutes. After cooling to room temperature, the mixture was partitioned between 10% sodium thiosulfate solution and EtOAc. The aqueous layer was extracted three times with ethyl acetate. The combined extracts were dried over sodium sulfate, filtered and concentrated. Flash chromatography, eluting with 25% EtOAc in hexanes afforded product. Yield: (75 mg, 68%).

1. customwas degassed by a stream of nitrogen through the solution for 10 minutes
2. customthe vial was capped
3. temperatureheated
4. temperatureto reflux for 15 minutes
5. customthe mixture was partitioned between 10% sodium thiosulfate solution and EtOAc
6. extractionThe aqueous layer was extracted three times with ethyl acetate
7. dry with materialThe combined extracts were dried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated
10. washFlash chromatography, eluting with 25% EtOAc in hexanes afforded product