反应详情

温度

0 °C

To 3-iodo-5-methyl-1-triisopropylsilanyl-1H-pyrrolo[2,3-b]pyridine (9, 40 g, 97.0 mmol) in 400 mL of tetrahydrofuran under nitrogen at −20° C., isopropylmagnesium chloride (54.8 mL, 2 M in tetrahydrofuran, 110 mmol) was added and the reaction allowed to warm to 0° C. over 30 minutes. The reaction was cooled to −40° C. and (6-fluoro-5-formyl-pyridin-2-yl)-(4-methoxy-benzyl)-carbamic acid tert-butyl ester (83, 15.81 g, 43.9 mmol) in tetrahydrofuran was added. The reaction was allowed to warm to 0° C. over an hour, then quenched with brine and extracted with ethyl acetate. The organic layer was dried over sodium sulfate, filtered and the filtrate concentrated under vacuum. The resulting material was purified by silica gel column chromatography, eluting with 0-40% ethyl acetate in hexane. Appropriate fractions were combined and the solvents removed under vacuum to provide the desired compound (136, 21 g, 32.4 mmol, 73.8% yield).

1. temperatureThe reaction was cooled to −40° C.
2. temperatureto warm to 0° C. over an hour
3. customquenched with brine
4. extractionextracted with ethyl acetate
5. dry with materialThe organic layer was dried over sodium sulfate
6. filtrationfiltered
7. concentrationthe filtrate concentrated under vacuum
8. customThe resulting material was purified by silica gel column chromatography
9. washeluting with 0-40% ethyl acetate in hexane
10. customthe solvents removed under vacuum