Methacryloyl chloride → Jak3-IN-6

Participants

Reaction Steps

To a solution of ethyl 4-(3-aminophenyl)-7H-pyrrolo[2,3-d]pyrimidine-5-carboxylate (50 mg, 0.18 mmol) and DIPEA (93 μL, 0.53 mmol) in THF (1.8 mL) at room temperature was added methacryloyl chloride (27.8 mg, 0.266 mmol) and the solution stirred for 1 hour. The reaction was quenched with ethanol (0.1 mL). The desired product was purified by reverse phase HPLC using an acetonitrile gradient in water with 0.1% TFA modifier. The combined fractions with the desired product were concentrated until only the water layer remained. The water layer was neutralized with 2M aqueous potassium bicarbonate and the mixture was extracted with ethyl acetate (×5). The combined organic fractions were dried over sodium sulfate, filtered and concentrated under reduced pressure to give ethyl 4-{3-[(2-methylacryloyl)amino]phenyl}-7H-pyrrolo[2,3-d]pyrimidine-5-carboxylate. LRMS (ESI) calc'd for C19H19N4O3 [M+H]+: 351, found 351. 1H NMR (600 MHz, DMSO-D6) δ 13.0 (s, 1H), 9.91 (s, 1H), 8.91 (s, 1H), 8.30 (s, 1H), 8.05 (s, 1H), 7.84 (d, 1H, J=7.04 Hz), 7.40 (t, 1H, J=7.63 Hz), 7.32 (d, 1H, J=7.04 Hz), 5.82 (s, 1H), 5.53 (s, 1H), 3.86 (q, 2H, J=7.04 Hz), 1.95 (s, 3H), 0.85 (t, 3H, J=7.04 Hz).

Provenance & Evidence