反应详情

温度

-50 °C

To a stirred solution of oxalyl chloride (1.6 mL, 18.2 mmol) in methylene chloride (20 mL) at −50° C. was added drop-wise a solution of DMSO (2.84 g, 36.4 mmol). The resulting mixture was stirred at −50° C. for 15 minutes, and a solution of (3-hydroxy-1-phenyl-propyl)-carbamic acid benzyl ester (4.7 g, 16.53 mmol) in methylene chloride 35 mL). The mixture was stirred at −50° C. for 15 minutes, then TEA (11.5 mL, 82.7 mmol) was added. The mixture was stirred for five minutes at −50° C., then allowed to stir at room temperature for 30 minutes. The reaction mixture was washed with 5% aqueous HCl, dried over MgSO4, filtered and concentrated under reduced pressure to give 4.7 g (100%) of (4-oxo-1-phenyl-butyl)-carbamic acid benzyl ester as a pale yellow oil.

1. stirringThe mixture was stirred at −50° C. for 15 minutes
2. stirringThe mixture was stirred for five minutes at −50° C.
3. stirringto stir at room temperature for 30 minutes
4. washThe reaction mixture was washed with 5% aqueous HCl
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure