Piperidine → 3-(3-Methoxy-4-((6-methoxypyridin-3-yl)methoxy)benzyl)-6-(5-methyl-1-azabicyclo[3.2.1]oct-6-en-7-yl)-3H-imidazo[4,5-b]pyridine

Participants

Reaction Conditions

Reaction Steps

To a stirred suspension of 6-iodo-3-(3-methoxy-4-((6-methoxypyridin-3-yl)methoxy)benzyl)-3H-imidazo[4,5-b]pyridine (Step 3, Example 19, 0.20 g, 0.40 mmol) in tetrahydrofuran (3.0 mL) was added 3-ethynyl-3-methylpiperidine hydrochloride (0.13 g, 1.00 mmol), bis(triphenylphosphine)palladium(II) chloride (0.055 g, 0.078 mmol), copper(I) iodide (0.030 g, 0.16 mmol), and piperidine (0.17 g, 2.00 mmol). The mixture was heated to 60° C. in a microwave reactor. After 30 min, the mixture was allowed to cool to room temperature and was filtered through Celite. The filtrate was concentrated, and the residue was purified by Prep-HPLC to afford 0.020 g (10%) of the product as a yellow solid: 1H NMR (500 MHz, CDCl3) δ 8.77 (d, J=2.0 Hz, 1H), 8.29 (d, J=2.0 Hz, 1H), 8.20 (d, J=2.0 Hz, 1H), 8.01 (s, 1H), 7.68 (dd, J=8.0, 2.0 Hz, 1H), 6.94-6.76 (m, 4H), 6.02 (s, 1H), 5.40 (s, 2H), 5.04 (s, 2H), 3.95 (s, 3H), 3.82 (s, 3H), 3.22 (d, J=8.5 Hz, 1H), 2.94-2.86 (m, 2H), 2.80 (d, J=9.5 Hz, 1H), 1.91-1.85 (m, 1H), 1.60-1.46 (m, 3H), 1.16 (s, 3H) ppm; (M+1)=498.

Provenance & Evidence