反应详情

To a cold (0° C.), stirred solution of diethyl zinc (1.0 M in hexanes, 4.0 mL, 4.0 mmol) in CH2Cl2 (10 mL) was added neat ClCH2I (0.59 mL, 8.10 mmol) drop wise by syringe. After 30 minutes, a solution of 2-(3-Hydroxymethyl-but-3-enyl)-isoindole-1,3-dione (0.456 g, 1.97 mmol) in CH2Cl2 (6 mL) was added by cannula. After 60 minutes, the reaction mixture was treated with saturated aqueous NH4Cl (20 mL), diluted with CH2Cl2 (20 mL), and warmed to room temperature. The phases were separated and the aqueous phase was extracted with CH2Cl2 (3×20 mL). The combined organic extracts were dried (Na2SO4) and concentrated. The crude material was purified by column chromatography on silica gel (1:1 hexanes-ethyl acetate) and provided 0.31 g (64%) of 1-[2-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-ethyl]-cyclopropane-methanol as a white solid. 1H NMR (CDCl3) δ 0.31-0.34 (m, 2H), 0.38-0.43 (m, 2H), 1.75 (t, 2H, J=6.9 Hz), 3.54 (s, 2H), 3.90 (t, 2H, J=6.6 Hz), 7.70-7.73 (m, 2H), 7.81-7.85 (m, 2H);

1. waitAfter 60 minutes
2. customThe phases were separated
3. extractionthe aqueous phase was extracted with CH2Cl2 (3×20 mL)
4. dry with materialThe combined organic extracts were dried (Na2SO4)
5. concentrationconcentrated
6. customThe crude material was purified by column chromatography on silica gel (1:1 hexanes-ethyl acetate)