反应详情

Preparation of(S)-ethyl 2-(3-(bromomethyl)-1-(4-chlorophenyl)naphthalen-2-yl)-2-tert-butoxyacetate: To a solution of (S)-ethyl 2-tert-butoxy-2-(1-(4-chlorophenyl)-3-methylnaphthalen-2-yl)acetate (3K, 43 mg, 0.0105 mmol) in CCl4 (2 mL) was added NBS (24 mg, 0.13 mmol) and AIBN (cat. amount). The reaction mixture was refluxed for 5 h. After cooling to room temperature, the reaction mixture was diluted by DCM, washed with sat. NaHCO3, extracted with DCM and the organic layers were combined and dried over MgSO4, filtered, concentrated and purified by flash column chromatography (silica gel, ethyl acetate/hexanes) to provide 12 mg of the desired product. 1H-MNR 400 MHz (CDCl3) δ: 8.01 (s, 1H), 7.77 (d, J=4 Hz, 1H), 7.43-7.15 (m, 7H), 5.11 (d, J=5.2 Hz, 1H), 5.06 (s, 1H), 5.00 (d, J=5.2 Hz, 1H), 4.07-4.02 (m, 2H), 1.20-1.15 (m, 3H), 0.96 (s, 9H).

1. temperatureThe reaction mixture was refluxed for 5 h
2. washwashed with sat. NaHCO3
3. extractionextracted with DCM
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. custompurified by flash column chromatography (silica gel, ethyl acetate/hexanes)