Diethyl Ether → N-(5-bromo-2-methanesulfonyl-phenyl)-acetamide

Temperature

25 °C

A solution of 5-bromo-2-methanesulfonyl-phenylamine (5.7 g, 19.5 mmol) in dry tetrahydrofuran (30 mL) at 25° C. was treated with acetyl chloride (6.28 g, 80 mmol). The resulting solution was stirred overnight at 25° C., at which time, thin layer chromatography analysis of the reaction mixture indicated the absence of starting material. The reaction mixture was then diluted with water (100 mL) and ethyl acetate (100 mL). The two layers were separated, and the aqueous layer was extracted with ethyl acetate (1×100 mL). The combined organic extracts were washed with a saturated aqueous sodium chloride solution (1×200 mL), dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo to afford a brown solid. The brown solid was treated with diethyl ether (50 mL) and hexanes (50 mL). The white solid was collected by filtration and washed with hexanes (50 mL) to afford N-(5-bromo-2-methanesulfonyl-phenyl)-acetamide (4.55 g, 80%) as a white solid: mp 157-160° C.; EI-HRMS m/e calcd for C9H10BrNO3S (M+) 290.9565, found 290.9560.

1. customThe two layers were separated
2. extractionthe aqueous layer was extracted with ethyl acetate (1×100 mL)
3. washThe combined organic extracts were washed with a saturated aqueous sodium chloride solution (1×200 mL)
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customto afford a brown solid
8. filtrationThe white solid was collected by filtration
9. washwashed with hexanes (50 mL)

ORD record

ord-a1dae8b61383475cbcd7e2e388295d87

Source dataset

uspto-grants-2002_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06441180B1