Acetic Acid → 6-((3S,4S)-4-Methyl-1-((2-methylpyrimidin-5-YL)methyl)pyrrolidin-3-YL)-1-(tetrahydro-2H-pyran-4-YL)-1,5-dihydro-4H-pyrazolo[3,4-D]pyrimidin-4-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 6-[(3S,4S)-4-methylpyrrolidin-3-yl]-1-(tetrahydro-2H-pyran-4-yl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one hydrogen chloride (493 mg) in 1,2-dichloroethane (10 mL) was added acetic acid (174 mg), 2-methylpyrimidine-5-carbaldehyde (236 mg) and sodium triacetoxy borohydride (635 mg). The reaction mixture was heated at 50° C. overnight. The reaction mixture was concentrated onto silica gel and purified by CombiFlash chromatography to provide the title compound (146 mg). 400 MHz 1H NMR (CDCl3) δ 8.63 (s, 2H), 8.01 (s, 1H), 4.82-4.76 (m, 1H), 4.12-4.08 (m, 2H), 3.68 (d, J=5.0 Hz, 3H), 3.64-3.54 (m, 2H), 3.28 (t, J=8.3 Hz, 1H), 3.04 (d, J=9.9 Hz, 1H), 2.89-2.86 (m, 1H), 2.71 (s, 3H), 2.66-2.62 (m, 1H), 2.49-2.27 (m, 3H), 1.97 (t, J=7.9 Hz, 1H), 1.91-1.83 (m, 2H), 1.19 (d, J=7.05 Hz, 3H). MS: (M+H m/z 410.2).

Provenance & Evidence