Water → 3-bromo-1-methyl-6-(methylsulfanyl)-1H-pyrazolo[3,4-d]pyrimidine

Participants

Reaction Conditions

Reaction Steps

1-Methyl-6-methylsulfanyl-1,2-dihydro-pyrazolo[3,4-d]pyrimidin-3-one (2.0 g, 0.01 mol) was refluxed with phosphorus oxybromide (6 g) in acetonitrile (60 mL). Water (100 mL) was then added and the reaction mixture cooled to 5° C., hold for 1 hour and filtered to give 1.6 g (61%) of pure 3-bromo-1-methyl-6-methylsulfanyl-1H-pyrazolo[3,4-d]pyrimidine; 1H-NMR (DMSO): δ 2.61 (s, 3H), 3.96 (s, 3H), 9.00 (s, 1H), LC/MS (m/e)=260.8 (MH+), Rt=1.89 min.

Provenance & Evidence