Trifluoroacetic acid → 3-(hydroxymethyl)-1-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]cyclobutylacetonitrile

Participants

Reaction Steps

To 3-(hydroxymethyl)-1-[4-(7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]cyclobutylacetonitrile (0.030 g, 0.000068 mol) was added 1.5 mL of TFA. The reaction was stirred at rt for 30 min, then evaporated to dryness. The crude mixture was dissolved in 1 mL of methanol and treated with 60 μL of ethylenediamine at rt for 5 h. The resulting mixture was purified on RP-HPLC (XBridge C18 column, eluting with a gradient of acetonitrile/water containing 0.15% NH4OH) to give the desired products as free bases. First peak retention time 0.766 min, LCMS calculated for C1-6H71N6O(M+H)+: 309.1; Found: 309.3. 1H NMR (400 MHz, DMSO-d6): δ 12.11(1H, br s), 8.67 (1H, s), 8.65 (1H, s), 8.37 (1H, s), 7.58 (1H, d, J=3.6), 7.02 (1H, d, J=3.6 Hz), 4.69 (1H, br s), 3.47 (2H, s), 3.41 (2H, br s), 2.53 (2H, m), 2.37 (2H, m) ppm. Second peak retention time 0.805 min, LCMS calculated for C16H17N6O(M+H)+: 309. 1; Found: 309.3. 1H NMR (400 MHz, DMSO-d6): δ 12.11(1H, br s), 8.80 (1H, s), 8.68 (1H, s), 8.40 (1H, s), 7.58 (1H, d, J=3.6 Hz), 7.07 (1H, d J=3.6 Hz), 4.78 (1H, br t, J=5.2 Hz), 3.47 (2H, br t, J=5.2 Hz), 3.36 (2H, s), 2.85 (2H, m), 2.29 (2H, m), ppm.

Provenance & Evidence