[CH:1]1([Mg]Br)[CH2:4][CH2:3][CH2:2]1.[Cl:7][C:8]1[CH:13]=[N:12][C:11]2[NH:14][CH:15]=[CH:16][C:10]=2[C:9]=1[CH:17]=[O:18].O>C1COCC1>[Cl:7][C:8]1[C:9]([CH:17]([CH:1]2[CH2:4][CH2:3][CH2:2]2)[OH:18])=[C:10]2[CH:16]=[CH:15][NH:14][C:11]2=[N:12][CH:13]=1The solution of cyclobutylmagnesium bromide (0.28 M in THF, 56 mL, 63 mmol) was added to a solution of 5-chloro-1H-pyrrolo[2,3-b]pyridine-4-carbaldehyde (0.908 g, 5.03 mmol, Adesis) in THF (30 mL) at about 0° C. The reaction mixture was stirred and allowed to warm to ambient temperature and the reaction mixture was stirred for about 16 h. Water (10 mL) was added and the volatiles were removed under reduced pressure. The product was extracted into DCM (3×20 mL) and the combined organic phases were dried over anhydrous MgSO4, filtered, the solvent was removed under reduced pressure and the crude material was purified by column chromatography over silica gel using a 10 to 45% gradient of EtOAc in heptane as the eluent to provide (5-chloro-1H-pyrrolo[2,3-b]pyridin-4-yl)(cyclobutyl)methanol as an off white solid (0.42 g, 32%); LC/MS (Table 2, Method a) Rt=2.02 min; m/z: 237 and 239 (M+H)+.
Wird geladen…
