反应详情

温度

-78 °C

Cyclopentylmagnesium bromide (1.6 mL, 3.15 mmol, 2M soln in ether) was added to a cooled −78° C. solution of 3-Cyclohex-1-enyl-thiopropionic acid S-pyridin-2-yl ester (0.65 g, 2.63 mmol, from Step 3) dissolved in THF (10 mL). The reaction mixture was stirred for 45 min at −78° C. and then warmed up to rt. The reaction was quenched with 1N HCl and extracted with EtOAc. The organic layer was washed with saturated NaHCO3, brine, dried over Na2SO4 and concentrated. The residue was purified by silica gel chromatography (0% to 5% EtOAc in hexanes) to give the title compound as a clear oil (0.39 g, 72%). 1H NMR (CDCl3): δ 1.51-1.83 (br m, 12H), 1.91 (m, 2H), 1.97 (m, 2H), 2.20 (t, 2H, J=7.6 Hz), 2.54 (t, 2H, J=7.8 Hz), 2.87 (m, 1H), 5.39 (s, 1H).

1. temperaturewarmed up to rt
2. customThe reaction was quenched with 1N HCl
3. extractionextracted with EtOAc
4. washThe organic layer was washed with saturated NaHCO3, brine
5. dry with materialdried over Na2SO4
6. concentrationconcentrated
7. customThe residue was purified by silica gel chromatography (0% to 5% EtOAc in hexanes)