Trifluoroacetic acid → 4-{3-(cyanomethyl)-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-1-yl}-N-isopropylpiperidine-1-carboxamide

Participants

Reaction Steps

To a solution 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 (0.075 g, 0.15 mmol, prepared as described in Example 1, Step H, except worked up to provide the free base) in methylene chloride (2 mL) was added N,N-diisopropylethylamine (0.026 mL, 0.15 mmol) followed by 2-isocyanatopropane (20 μL, 0.2 mmol, Aldrich). The reaction was continued for 2 hours. The crude product was deprotected by the addition of 1 mL TFA to the solution, which was stirred for 1 hour and evaporated. The deprotection was completed by stirring with ethylenediamine (0.2 mL) in methanol for 30 minutes. The product was purified by preparative HPLC-MS (C18 eluting with a gradient of MeCN/H2O containing 0.15% NH4OH). Fractions containing desired product were frozen and lyophilized. Yield: 0.025 g (37%); LC-MS: 448.2 (M+H)+. 1H NMR (300 MHz, CDCl3): δ 10.21 (br s, 1H), 8.85 (s, 1H), 8.41 (s, 1H), 8.32 (s, 1H), 7.41 (dd, 1H), 6.79 (dd, 1H), 4.22 (d, 1H), 4.04-3.87 (m, 1H), 3.81-3.69 (m, 4H), 3.61 (d, 2H), 3.40 (s, 2H), 3.00-2.86 (dq, 2H), 2.44-2.31 (m, 1H), 1.76-1.64 (m, 2H), 1.40-1.22 (m, 2H), 1.15 (d, 6H).

Provenance & Evidence