反应详情

To a solution of methyl 4-(4-chloro-2-fluorophenyl)-6-methylnicotinate (0.32 g, 1.144 mmol) in tetrahydrofuran (10 mL) at −10° C., LAH (1.716 mL, 1.716 mmol) was added portionwise. The reaction mixture was stirred for 2 h at RT then diluted with saturated aqueous NH4Cl (50 mL). The mixture was extracted with ethyl acetate (80 mL). The organic layer was separated, dried over Na2SO4 and concentrated to afford (4-(4-chloro-2-fluorophenyl)-6-methylpyridin-3-yl) methanol (0.25 g, 0.993 mmol, 87% yield) as off-white solid. LCMS (ESI) m/e 252.0 [(M+H)+, calcd for C13H12ClFNO 252.0]; LC/MS retention time (Method H): tR=1.60 min; 1H NMR (400 MHz, CDCl3) δ 7.69 (s, 1H), 7.52 (s, 1H), 7.23 (s, 2H), 7.04-7.17 (m, 1H), 4.57 (d, J=11.60 Hz, 2H), 2.60 (s, 3H).

1. extractionThe mixture was extracted with ethyl acetate (80 mL)
2. customThe organic layer was separated
3. dry with materialdried over Na2SO4
4. concentrationconcentrated