反应详情

To a solution of methyl 5,5-dimethyl-2-oxocyclohexanecarboxylate (6.0 g, 33 mmol) and 2-chloroacetimidamide hydrochloride (4.6 g, 36 mmol) in methanol (30 mL) was added sodium methoxide (4.4 M in MeOH, 9.0 mL, 40 mmol). The reaction mixture was stirred at ambient temperature for three hours and then concentrated. The resulting residue was partitioned between ethyl acetate and aqueous sodium bicarbonate. The organic layer was washed with brine, dried over magnesium sulfate and concentrated. Purification by silica gel chromatography provided 2-(chloromethyl)-6,6-dimethyl-5,6,7,8-tetrahydroquinazolin-4-ol (4.2 g, 57% yield) as a white solid. MS (ES) for C11H15ClN2O: 227 (MH+).

1. concentrationconcentrated
2. customThe resulting residue was partitioned between ethyl acetate and aqueous sodium bicarbonate
3. washThe organic layer was washed with brine
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated
6. customPurification by silica gel chromatography