反应详情

To a stirred solution of 1.04 g (4.28 mmol) of methyl 4-hydroxy-8-cyclopropylquinoline-2-carboxylate in 11 mL of DMF was added 1.18 g of K2CO3 and 0.68 mL of ethyl iodide successively and the mixture was stirred at 60 deg C. for 12 hr. The mixture was partitioned between AcOEt and H2O and the organic layer was washed with H2O and satd. brine, dried over anhydrous Na2SO4, and then concentrated. The residue was purified on SiO2 column chromatography (eluted with n-Hex/AcOEt=19/1) to yield methyl 4-ethoxy-8-cyclopropylquinoline-2-carboxylate as a pale yellow solid.

1. customThe mixture was partitioned between AcOEt and H2O
2. washthe organic layer was washed with H2O and satd
3. dry with materialbrine, dried over anhydrous Na2SO4
4. concentrationconcentrated
5. customThe residue was purified on SiO2 column chromatography (eluted with n-Hex/AcOEt=19/1)