Triethylamine → N-(5-bromo-4-fluoro-1H-pyrrolo[2,3-b]pyridin-3-yl)-3-methylpicolinamide

Participants

Reaction Steps

A solution of 5-bromo-4-fluoro-1H-pyrrolo[2,3-b]pyridin-3-amine (200 mg, 0.869 mmol, Example 1, Step H) in CH2Cl2 (10 mL) was treated with 3-methylpicolinic acid (143 mg, 1.04 mmol), bis(2-oxooxazolidin-3-yl)phosphinic chloride (332 mg, 1.30 mmol) and triethylamine (440 mg, 4.35 mmol). The reaction was stirred at room temperature for 1 hour. The mixture was filtered to remove the product, and the filtrate was concentrated in vacuo. The residue was stirred in anhydrous THF (10 mL), treated with 2M LiOH solution (3 mL) and stirred at room temperature for 1 hour. The organic solvent was removed in vacuo, and then water (10 mL) was added. The reaction stirred for 1 hour. The solid, which separated, was filtered and washed with water and CH2Cl2 (10 mL). The combined filtered cakes were dried to yield N-(5-bromo-4-fluoro-1H-pyrrolo[2,3-b]pyridin-3-yl)-3-methylpicolinamide (197 mg, 65% yield). 1H NMR (400 MHz, (CD3)2SO) δ 12.13 (br s, 1H), 10.42 (s, 1H), 8.56 (d, 1H), 8.39 (d, 1H), 7.87 (d, 1H), 7.84 (d, 1H), 7.55 (dd, 1H) 2.67 (s, 3H); LCMS (APCI+) m/z 349.1, 351 (M+H)+, Retention time=3.42 minutes (Method 3).

Provenance & Evidence