Water → 8-isopropyl-4-methyl-2-(methylsulfonyl)pyrido[2,3-d]pyrimidin-7(8H)-one

Participants

Reaction Steps

8-Isopropyl-4-methyl-2-(methylthio)pyrido[2,3-d]pyrimidin-7(8H)-one (5.38 g, 21.59 mmol) was dissolved in 100 mL DCM. To the stirring solution, m-CPBA (13.97 g, 64.78 mmol) was added. The reaction was allowed to stir for 2.5 h at room temperature. LCMS indicated reaction had gone to completion. Sample was diluted with 300 mL of DCM and 300 mL K2CO3, upon addition of base a white precipitate formed that dissolved in excess H2O. Organic layer was extracted further with H2O and brine, and then dried over Na2CO3. The solvent was evaporated to afford the product 8-isopropyl-4-methyl-2-(methylsulfonyl)pyrido[2,3-d]pyrimidin-7(8H)-one (6.0 g, 99% yield) as a light yellow oil that was used immediately in the next reaction.

Provenance & Evidence