反应详情

To a solution of N-{1-[[5-methyl-3-(2-methylsulfonylphenylsulfonyloxy)phenoxy]methyl]cyclopropylmethoxy}phthalimide (5.4 g, 9.5 mmol), as prepared in the preceding step, in ethanol (100 mL)/tetrahydrofuran (100 mL)/water (50 mL) was added sodium borohydride (1.15 g, 30.0 mmol). The reaction mixture was stirred at ambient temperature overnight. 2N HCl was added to adjust the pH to 1-2, the mixture was heated to 50° C. for 2 hours. The reaction mixture was concentrated to about 100 mL, water (50 mL) was added and the mixture was neutralized to pH 8-9 with 2N NaOH. The mixture was extracted into ethyl acetate (3×100 mL) and the organic phase was washed with brine (2×100 mL) and then dried over Na2SO4. After removing the solvent, the residue was purified by flash column chromatography (4:1 ethyl acetate/hexane) to give the title compound as a white solid (3.6 g, 86%). 1H-NMR (300 MHz, CDCl3) δ8.45 (d, J=7.8 Hz, 1H), 8.13 (d, J=7.8 Hz, 1H), 7.88 (t, J=7.7 Hz, 1H), 7.74 (t, J=7.7 Hz, 1H), 6.61 (s, 1H), 6.58 (s, 2H), 5.44 (br s, 2H),3.76 (s, 2H), 3,63 (s 2H), 3.45 (s, 3H), 2.23 (s, 3H), 0.57-0.65 (m, 4H).

1. temperaturethe mixture was heated to 50° C. for 2 hours
2. concentrationThe reaction mixture was concentrated to about 100 mL, water (50 mL)
3. additionwas added
4. extractionThe mixture was extracted into ethyl acetate (3×100 mL)
5. washthe organic phase was washed with brine (2×100 mL)
6. dry with materialdried over Na2SO4
7. customAfter removing the solvent
8. customthe residue was purified by flash column chromatography (4:1 ethyl acetate/hexane)