2-甲磺酰甲烷

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Addition of 2-methylthioethanol (10.0 g, 0.108 mol) to sodium hydride (9.54 g of a 60% dispersion in mineral oil, 0.238 mol, washed twice with hexane) followed by reaction with 2-bromopropionic acid (16.6 g, 0.108 mol) gave 13.81 g (78% yield) of the title compound as a clear oil; bp 80–90° C./0.2 torr (bulb to bulb distillation, air bath temperature). 1HNMR 400 MHz (CDCl3) δ ppm: 1.49 (3H, d, J=7.0 Hz, CH3), 2.18 (3H, s, SCH3), 2.76 (2H, t, J=6.6 Hz, CH2), 3.74 (2H, t, J=6.6 Hz, CH2), 4.07 (1H, d, J=7.0 Hz, OCH). washed twice with hexane)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of 2-methylthioethanol (10.0 g, 0.108 mol) in dry tetrahydrofuran (25 ml) was added dropwise, over 30 min, to a suspension of sodium hydride (9.54 g of a 60% dispersion in mineral oil, 0.238 mol, washed twice with hexane) in dry tetrahydrofuran (250 ml) at 22° C. After 30 min, a solution of chloroacetic acid (10.25 g, 0.108 mol) in dry tetrahydrofuran (20 ml) was added dropwise, over 30 min at 22° C., and the resulting mixture was then heated under reflux for 5 h. The cooled mixture was treated with 250 ml of 1 N hydrochloric acid and sodium chloride added to the aqueous phase until saturation. The organic phase was separated and the aqueous phase washed with ethyl acetate. The combined organic extracts were washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. Distillation of the resulting residue in vacuo gave 11.27 g (69% yield) of the title acid as a clear oil; bp 85–95° C./0.3 torr (bulb to bulb distillation, air bath temperature). 1HNMR 400 MHz (CDCl3) δ ppm: 2.18 (3H, s, SCH3), 2.76 (2H, t, J=6.6 Hz, CH2), 3.77 (2H, t, J=6.6 Hz, CH2), 4.20 (2H, s, OCH2). washed twice with hexane) in dry tetrahydrofuran (250 ml) at 22° C the resulting mixture was then heated under reflux for 5 h added to the aqueous phase until saturation The organic phase was separated the aqueous phase washed with ethyl acetate The combined organic extracts were washed with brine dried over anhydrous magnesium sulfate concentrated under reduced pressure Distillation of the resulting residue in vacuo

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of methyl 2-((S)-6-((R)-7-fluoro-4-(4-hydroxy-2,6-dimethylphenyl)-2,3-dihydro-1H-inden-1-yloxy)-2,3-dihydrobenzofuran-3-yl)acetate (280 mg) and 2-(methylthio)-ethanol (54 μL) in toluene (8 mL) are successively added 1,1′-(azodicarbonyl)-dipiperidine (240 mg) and tributylphosphine (240 mL). The mixture is stirred for 12 hours at room temperature, partitioned between saturated aqueous NaHCO3 solution and dichloromethane and stirred for 30 minutes. The phases are separated and the organic phase is dried (MgSO4). The solvents are evaporated and the residue is chromatographed on silica gel (cyclohexane/ethyl acetate 90:10→70:30) to give the title compound. Yield: 235 mg; LC (method 4): tR=1.97 min; Mass spectrum (ESI+): m/z=537 [M+H]+. partitioned between saturated aqueous NaHCO3 solution and dichloromethane stirred for 30 minutes The phases are separated the organic phase is dried (MgSO4) The solvents are evaporated the residue is chromatographed on silica gel (cyclohexane/ethyl acetate 90:10→70:30)