Sodium borohydride → 3-Mercapto-2,2-dimethyl-1-propylsulfonamide

To a solution of 5.15 g of 3-thiocyanato-2,2-dimethyl-1-propanesulfonamide in 100 ml of ethanol was little by little added 0.79 g of sodium borohydride with stirring and nitrogen gas atmosphere, taking an hour. The reaction mixture was refluxed for an hour and concentrated under reduced pressure. To the residue were added 20 ml of water and 30 ml of 1N-hydrochloric acid. The organic layer was collected, and the aqueous layer was washed with ethyl acetate (50 ml×3). The combined organic layers were dried over anhydrous magnesium sulfate and distilled to remove the solvent. The residue was subjected to a silica gel chromatography, eluting with chloroform-methanol (10:1), to obtain 0.76 g of 3-mercapto-2,2,-dimethyl-1-propanesulfonamide.

1. waitnitrogen gas atmosphere, taking an hour
2. temperatureThe reaction mixture was refluxed for an hour
3. concentrationconcentrated under reduced pressure
4. additionTo the residue were added 20 ml of water and 30 ml of 1N-hydrochloric acid
5. customThe organic layer was collected
6. washthe aqueous layer was washed with ethyl acetate (50 ml×3)
7. dry with materialThe combined organic layers were dried over anhydrous magnesium sulfate
8. distillationdistilled
9. customto remove the solvent
10. washeluting with chloroform-methanol (10:1)

ORD record

ord-5778056959174b35918d0187a4a3f5dd

Source dataset

uspto-grants-1992_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05155108