反应详情

温度

0 °C

To a solution of 3-(3-bromophenyl)-4-(4-chlorophenyl)-3-methyl-2-butanol (fasting eluting diastereomer, 0.90 g, 2.5 mmol) in ethyl acetate (80 mL) at 0° C. was added triethyl amine (dried over activated molecular sieves, 0.42 mL. 3.1 mmol) and methanesulfonyl chloride (0.22 mL, 2.8 mmol). After stirring at 0° C. for 2 h, the reaction was quenched by addition of saturated aqueous sodium bicarbonate (10 mL). After stirring at room temperature for 0.5 h, the organic layer was separated, washed with brine, dried over anhydrous magnesium sulfate, filtered, and concentrated to dryness to give the crude sulfonate, which was used without further purification. Thus, a mixture of the sulfonate and sodium azide (0.83 g, 0.13 mol) in dimethylformamide (5 mL) was heated at 120° C. for 4 h. The reaction mixture was cooled to room temperature and was poured into water (40 mL), and the product was extracted with ether (2×20 mL). The combined organic extracts were washed with water, dried over magnesium sulfate, filtered and concentrated to dryness, and the residue was purified on a silica gel column eluting with hexane to give the title compound (Diastereomer α). 1H NMR (400 MHz, CD3OD): δ 7.43-7.20 (m, 4H), 7.04 (d, 2H), 6.64 (d, 2H), 4.10 (q, 1H), 3.10 (d, 1H), 3.00 (d, 1H), 1.02 (d, 3H).

1. customthe reaction was quenched by addition of saturated aqueous sodium bicarbonate (10 mL)
2. stirringAfter stirring at room temperature for 0.5 h
3. customthe organic layer was separated
4. washwashed with brine
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated to dryness
8. customto give the crude sulfonate, which
9. customwas used without further purification
10. temperaturewas heated at 120° C. for 4 h
11. temperatureThe reaction mixture was cooled to room temperature
12. extractionthe product was extracted with ether (2×20 mL)
13. washThe combined organic extracts were washed with water
14. dry with materialdried over magnesium sulfate
15. filtrationfiltered
16. concentrationconcentrated to dryness
17. customthe residue was purified on a silica gel column
18. washeluting with hexane