反应详情

The solution of 2-(2-formyl-4-methoxyphenylamino)-2-oxoethyl acetate (5 g, 0.02 mol) and ammonia (6.8 g, 0.4 mol, 20 eq) in EtOH (30 mL) was reacted under a high pressure (30 psi) at 135° C. for 5 h. After cooling to room temperature, the solvent was evaporated in vacuum. The residual aqueous solution was extracted with DCM (100 mL×3). The combined extracts were dried over anhydrous Na2SO4 and evaporated to dryness in vacuum. The crude product was purified by chromatography (eluting with DCM/MeOH=100/1) to give (6-methoxyquinazolin-2-yl)methanol (4.1 g, yield: 90%) as a white solid. 1HNMR (400 MHz, DMSO-d6) δ: 9.46 (s, 1H), 7.90 (d, J=8.8 Hz, 1H), 7.63 (d, J=8.8, 3.2 Hz, 1H), 7.52 (d, J=2.8 Hz, 1H), 5.34 (t, J=6.4 Hz, 1H), 4.72 (d, J=6.4 Hz, 2H), 3.91 (m, 3H); ESI-MS: m/z 191.1 ([M+1]+).

1. customthe solvent was evaporated in vacuum
2. extractionThe residual aqueous solution was extracted with DCM (100 mL×3)
3. dry with materialThe combined extracts were dried over anhydrous Na2SO4
4. customevaporated to dryness in vacuum
5. customThe crude product was purified by chromatography (eluting with DCM/MeOH=100/1)