Br[C:2]1[C:7]([CH3:8])=[CH:6][C:5]([F:9])=[CH:4][N:3]=1.[C:10](=[N:23][NH2:24])([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.CC(C)([O-])C.[K+]>C1(C)C=CC=CC=1.C1(B(O)O)C=CC=CC=1>[C:10](=[N:23][NH:24][C:2]1[C:7]([CH3:8])=[CH:6][C:5]([F:9])=[CH:4][N:3]=1)([C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1A mixture of 2-bromo-5-fluoro-3-methyl-pyridine (190 mg, 1.0 mmol), benzhydrylidene-hydrazine (216 mg, 1.1 mmol), phenylboronic acid (5 mol %, 6 mg) and potassium tert-butoxide (157 mg, 1.4 mmol) in anhydrous toluene (6 mL) was degassed with a stream of argon, treated with Pd(OAc)2 (2 mol %, 5 mg) and racemic (1,1′-binaphthalene-2,2′-diyl)bis(diphenylphosphine) (2 mol %, 12 mg) and stirred at 80° C. for 1 h. After cooling to RT, the reaction mixture was diluted with EtOAc and washed with water followed by a saturated aqueous solution of NaHCO3. The organic layer was dried (MgSO4) and concentrated in vacuo. The resultant residue was purified by FCC on silica, using a gradient of 1-10% MeOH in DCM followed by 100% DCM, to afford the title compound (196 mg, 64%). LCMS (Method 4): Rt 3.44 min, m/z 306 [MH+].
読み込み中…
