Water → S-(4-Bromophenyl)-N-[2-(diethylamino)ethyl]-S-methylsulfoximine hydrate

Temperature

0 °C

A solution of 4-bromophenyl-methylsulfoximine (10.0 g, 42.7 mmol) in dimethylformamide (50 mL) was added dropwise to a stirring slurry of sodium hydride (2.04 g, 51.2 mmol, 60% oil dispersion washed (3×20 mL) with hexane) which was maintained at 0° C. After stirring for 30 minutes, a solution of diethylaminoethyl chloride (6.58 g, 48.3 mmol) in dimethylformamide (20 mL) was added dropwise. The reaction mixture was warmed at 60° C. for 18 h. The reaction mixture was then cooled to ambient temperature, and 5 mL of water was added. The resulting solution was concentrated in vacuo. The residue was partitioned between 0.1N aqueous HCl (100 mL) and methylene chloride (100 mL). The layers were separated, and the aqueous layer was extracted with methylene chloride (2×50 mL). The aqueous layer was then made basic with 50% aqueous sodium hydroxide, and the resulting slurry was extracted with methylene chloride. These combined organic extracts were washed with saturated sodium chloride, dried (Na2SO4) and concentrated in vacuo. The residue was chromatographed (flash, SiO2, 9:1 methylene chloride:methanol) to give 9.1 g (62%) of clear oil.

1. temperatureThe reaction mixture was warmed at 60° C. for 18 h
2. temperatureThe reaction mixture was then cooled to ambient temperature
3. concentrationThe resulting solution was concentrated in vacuo
4. customThe residue was partitioned between 0.1N aqueous HCl (100 mL) and methylene chloride (100 mL)
5. customThe layers were separated
6. extractionthe aqueous layer was extracted with methylene chloride (2×50 mL)
7. extractionthe resulting slurry was extracted with methylene chloride
8. washThese combined organic extracts were washed with saturated sodium chloride
9. dry with materialdried (Na2SO4)
10. concentrationconcentrated in vacuo
11. customThe residue was chromatographed (flash, SiO2, 9:1 methylene chloride:methanol)

ORD record

ord-cbc7e484cce54e88aa412f63d50c74d8

Source dataset

uspto-grants-1992_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05140026