反应详情

2-(tert-Butyldimethylsilyloxy)acetaldehyde (0.037 mL, 0.19 mmol) was added to a mixture of (R)-N-(4-(3-aminopiperidin-1-yl)-5-bromo-1H-pyrrolo[2,3-b]pyridin-3-yl)-3-chloro-4-fluorobenzamide (70 mg, 0.13 mmol, Example 62), DIEA (0.068 mL, 0.39 mmol), and trimethyl orthoformate (280 mg, 2.6 mmol) in MeOH (3 mL), and the reaction was stirred at room temperature for 18 hours. NaBH4 (9.8 mg, 0.26 mmol) was then added, and the reaction was stirred for 1 hour. The mixture was poured into a saturated solution of NaHCO3, and extracted with CH2Cl2. The combined organic fractions were dried (MgSO4), filtered, and concentrated in vacuo. The residue obtained was purified by column chromatography on silica gel eluting with 2% MeOH:CH2Cl2 to provide (R)-N-(5-bromo-4-(3-(2-(tert-butyldimethylsilyloxy)ethylamino)piperidin-1-yl)-1H-pyrrolo[2,3-b]pyridin-3-yl)-3-chloro-4-fluorobenzamide (32 mg, 39% yield).

1. stirringthe reaction was stirred for 1 hour
2. extractionextracted with CH2Cl2
3. dry with materialThe combined organic fractions were dried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue obtained
7. customwas purified by column chromatography on silica gel eluting with 2% MeOH