1-Bromo-2-methylpropane → 4-fluoro-N-isobutyl-N-(5-isopropyl-3-methylpyridin-2-yl)benzenesulfonamide

4-fluoro-N-(5-isopropyl-3-methylpyridin-2-yl)benzenesulfonamide (127 mg, 0.41 mmol) was dissolved in acetonitrile (3 mL) and to this solution was added 2-(tert-butyl)-1,1,3,3-tetramethylguanidine (0.09 mL, 0.41 mmol). The mixture was allowed to stir at room temperature for 30 minutes, 1-bromo-2-methylpropane (0.09 mL, 0.83 mmol) was then added to the mixture and the reaction vessel sealed and heated by microwaves to 150° C. for 1 hour. The reaction mixture was concentrated in vacuo and the crude product extracted to the organic phase of an aqueous workup between ethyl acetate and water. The organic phase was then passed through a hydrophobic frit, concentrated in vacuo and purified by mass directed autoprep (formic acid modifier) to give the title compound (73 mg). LCMS (2 min, formic) Rt 1.44 min, m/z (ES+) 365 (M+H).

1. customthe reaction vessel sealed
2. temperatureheated by microwaves to 150° C. for 1 hour
3. concentrationThe reaction mixture was concentrated in vacuo
4. extractionthe crude product extracted to the organic phase of an aqueous workup between ethyl acetate and water
5. concentrationconcentrated in vacuo
6. custompurified by mass

ORD record

ord-410d0e22a4714b398548ff9d09b6ee0c

Source dataset

uspto-grants-2016_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09242972B2