反应详情

tert-Butyl 4-(3-methoxy-4-nitrophenyl)-5,6-dihydropyridine-1(2H)-carboxylate (I25) (5.609 g, 16.78 mmol) was dissolved in 1:1 ethanol:ethyl acetate (500 mL) and Pd/C (2.50 g) was added. The mixture was stirred vigorously under hydrogen for five hours then filtered through celite. The celite was washed with ethyl acetate (500 mL) and the combined filtrates evaporated to give the title compound (I26) (4.93 g, 96% yield) as an off-white solid; 1H NMR (400 MHz, CDCl3) δ 6.69-6.60 (m, 3H), 4.22 (s, 2H), 3.84 (s, 3H), 2.78 (t, J=12.4 Hz, 2H), 2.54 (tt, J=12.1, 3.5 Hz, 1H), 1.80 (d, J=13.1 Hz, 2H), 1.65-1.53 (m, 2H), 1.48 (s, 9H). LCMS Method C: rt 4.91 min; m/z 251.1 [M-tBu+2H]+, 207.2 [M-Boc+2H]+.

1. filtrationthen filtered through celite
2. washThe celite was washed with ethyl acetate (500 mL)
3. customthe combined filtrates evaporated