Triethylamine → 4-(4-{[3-fluoro-5-(trifluoromethyl)pyridin-2-yl]carbonyl}piperazin-1-yl)-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]butanenitrile

Participants

Reaction Steps

N,N,N′,N-Tetramethyl-O-(7-azabenzotriazol-1-yl)uronium hexafluorophosphate (16.2 mg, 0.0000426 mol) was added to a solution of 3-fluoro-5-(trifluoromethyl)pyridine-2-carboxylic acid (11 mg, 0.053 mmol) and triethylamine (30 microL, 0.21 mmol) in THF (0.4 mL). After stirring for 15 minutes, 4-piperazin-1-yl-3-[4-(7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]butanenitrile hydrochloride (21 mg, 0.035 mmol; from Example 12, Step 2) was added and the reaction was stirred for two hours. The reaction mixture was partitioned between ethyl acetate and water. The organic layer was washed successively with water, 0.1N NaOH and brine, dried over sodium sulfate and concentrated. The residue was dissolved and stirred in a 1:1 mixture of DCM:TFA for 1 hour, concentrated, then stirred in methanol (1 mL) containing ethylenediamine (0.2 mL) for one hour. Preparative HPLC-MS, eluting with a gradient of MeCN/H2O containing 0.15% NH4OH, was used to purify the product (9 mg, 48%). 1H NMR (300 MHz, d6-dmso): δ □8.88 (s, 1H), 8.81 (s, 1H), 8.67 (s, 1H), 8.48 (dd, 1H), 8.37 (s, 1H), 7.60 (d, 1H), 6.97 (d, 1H), 4.99 (tt, 1H), 3.67-3.56 (m, 2H), 3.25-3.12 (m, 4H), 2.92-2.79 (m, 2H), 2.66-2.55 (m, 1H), 2.55-2.38 (m 2H), 2.38-2.25 (m, 1H); LCMS (M+H)+: 528.3.

Provenance & Evidence