反应详情

A suspension of 6-(3-(tert-butyldimethyl silyloxy)prop-1-ynyl)-N-(3-chloro-4-fluorophenyl)-2-(pyridin-3-yl)quinazolin-4-amine (0.20 g, 0.39 mmol) and 5% Pd—S—C (40 mg) in EtOAc (5 mL) and MeOH (5 mL) was stirred overnight at room temperature under hydrogen atmosphere. The reaction mixture was filtered through Celite. The filtrate was concentrated in vacuo. The residue was purified by column chromatography on silica gel (eluted with hexane/ethyl acetate 6:1 to 2:3) to give 0.15 g of 6-(3-(tert-butyldimethylsilyloxy)propyl)-N-(3-chloro-4-fluorophenyl)-2-(pyridin-3-yl)quinazolin-4-amine as yellow solid (74%). LCMS m/z=523 (M+1) (Method D) (retention time=3.35 min). 1H NMR (300 MHz, CDCl3) δ 9.69 (dd, J=2.2, 0.8 Hz, 1H), 8.79-8.65 (m, 2H), 8.07 (dd, J=6.5, 2.7 Hz, 1H), 7.94 (d, J=8.5 Hz, 1H), 7.76-7.61 (m, 3H), 7.47-7.37 (m, 2H), 7.31-7.18 (m, 1H), 3.68 (t, J=6.1 Hz, 2H), 3.01-2.83 (m, 2H), 2.03-1.86 (m, 2H), 0.94 (s, 9H), 0.08 (s, 6H).

1. filtrationThe reaction mixture was filtered through Celite
2. concentrationThe filtrate was concentrated in vacuo
3. customThe residue was purified by column chromatography on silica gel (eluted with hexane/ethyl acetate 6:1 to 2:3)