Triethylamine → {1-(1-{[6-[(dimethylamino)methyl]-2-(trifluoromethyl)pyrimidin-4-yl]carbonyl}piperidin-4-yl)-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-3-yl}acetonitrile

Participants

Reaction Steps

6-[(Dimethylamino)methyl]-2-(trifluoromethyl)pyrimidine-4-carboxylic acid (22.8 mg, 0.0913 mmol, from Step B) was dissolved in tetrahydrofuran (0.67 mL), and triethylamine (33.9 μL, 0.244 mmol) and N,N,N′,N′-tetramethyl-O-(7-azabenzotriazol-1-yl)uronium hexafluorophosphate (32.4 mg, 0.0852 mmol) were added. The mixture was stirred for 15 minutes, followed by the addition of {1-piperidin-4-yl-3-[4-(7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-3-yl}acetonitrile (30.0 mg, 0.0609 mmol, prepared as described in Example 1, Step H, except worked up to provide the free base). After two hours, the reaction mixture was partitioned between ethyl acetate and water. The organic layer was washed with water, 0.1N NaOH and sat. NaCl, dried over sodium sulfate and concentrated. The residue was stirred in a 1:1 mixture of DCM:TFA for 1 hour, concentrated, and stirred in methanol (1 mL) containing ethylenediamine (0.2 mL) until the deprotection was complete. Purification via preparative HPLC-MS (C18 eluting with a gradient of MeCN/H2O containing 0.15% NH4OH), afforded the desired compound as a white powder. Yield: 0.014 g (39%); LC-MS: 594.4 (M+H)+. 1H NMR (400 MHz, DMSO-d6): δ 12.14 (br s, 1H), 8.82 (s, 1H), 8.69 (s, 1H), 8.42 (s, 1H), 7.90 (s, 1H), 7.61 (dd, 1H), 7.07 (dd, 1H), 4.07 (ddd, 1H), 3.77-3.72 (m, 2H), 3.70 (s, 2H), 3.63-3.48 (m, 5H), 3.31-3.22 (m, 1H), 3.16-3.07 (m, 1H), 2.60-2.53 (m, 1H), 2.25 (s, 6H), 1.85-1.73 (m, 1H), 1.71-1.59 (m, 1H), 1.37-1.18 (m, 2H). 19F NMR (400 MHz, DMSO-d6): δ −69.45 (s, 3F).

Provenance & Evidence