6-Methoxypyridine-3-carbaldehyde → 6-{(3S,4S)-4-ethyl-1-[(6-methoxypyridin-3-yl)methyl]pyrrolidin-3-yl}-1-(tetrahydro-2H-pyran-4-yl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one

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Reaction Steps

Following the procedure for the preparation of 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 but substituting 6-[(3S,4S)-4-ethylpyrrolidin-3-yl]-1-(tetrahydro-2H-pyran-4-yl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one hydrogen chloride, sodium cyanoborohydride and 6-methoxynicotinaldehyde provided the title compound. 400 MHz 1H NMR (CDCl3) δ 8.04 (d, J=2.1 Hz, 1H), 8.02 (s, 1H), 7.73-7.71 (m, 1H), 6.78 (d, J=8.7 Hz, 1H), 4.80-4.75 (m, 1H), 4.12-4.10 (m, 2H), 3.92-3.90 (m, 3H), 3.72-3.70 (m, 1H), 3.61-3.54 (m, 3H), 3.32 (t, J=8.3 Hz, 1H), 2.99 (m, 1H), 2.91 (m, 1H), 2.41 (m, 1H), 2.40-2.28 (m, 2H), 2.21 (m, 1H), 1.95 (m, 1H), 1.91-1.83 (m, 2H), 1.65-1.45 (m, 2H), 0.92 (t, J=7.5 Hz, 3H). MS: (M+H m/z 439.2).

Provenance & Evidence