反应详情

To a stirred solution of 3-(3'-ethoxy-4'-methoxyphenyl)-3-phthalimido-1-propanol (680 mg, 1.92 mmol), benzyl bromide (0.46 mL, 3.86 mmol), and tetrabutyl ammonium iodide (80 mg, 0.21 mmol) in THF (20 mL) at room temperature, was added NaH (240 mg, 60%, 6.0 mmol). The mixture was stirred at room temperature for 15 h. To the mixture was added a few drops of NH4Cl, then HCl (1N, 25 mL). The organic layer was separated. The aqueous layer was extracted with ethyl acetate (3×25 mL). The combined organic layers were washed with brine (25 mL), and dried over magnesium sulfate. Removal of solvent and chromatography (silica gel 100 grams, 1:5 EtOAc:hexane) gave 1-benzyloxy-3-(3'-ethoxy-4'-methoxyphenyl)-3-phthalimidopropane as an oil, (510 mg, 60% yield): 1H NMR (CDCl3)δ1.46 (t, J=6.9 Hz, 3H, CH3), 2.51-2.59 (m, 1H, CHH), 2.86-2.96 (m, 1H, CHH), 3.51 (t, J=5.5 Hz, CH2), 3.85 (s, 3H, CH3), 4.10 (q, J=7 Hz, CH2), 4.43 (s, 2H, PhCH2), 5.54 (dd, J=6.5, 9.5 Hz, 1H, NCH), 6.80 (d, J=8 Hz, 1H, Ar), 7.09-7.27 (m, 7H, Ar), 7.65-7.79 (m, 4H, Ar); 13C NMR (CDCl3)δ14.73, 31.37, 52.12, 55.88, 64.29, 67.31, 73.10, 111.11, 112.95, 120.59, 123.09, 127.42, 127.62, 128.22, 131.92, 132.09, 133.77, 138.09, 148.12, 148.84, 168.42; Anal Calcd for C27H27 NO5 : C, 72.79; H, 6.11; N, 3.14. Found: C, 72.66; H, 6.32; N, 3.16.

1. customThe organic layer was separated
2. extractionThe aqueous layer was extracted with ethyl acetate (3×25 mL)
3. washThe combined organic layers were washed with brine (25 mL)
4. dry with materialdried over magnesium sulfate
5. customRemoval of solvent and chromatography (silica gel 100 grams, 1:5 EtOAc:hexane)