Acetic Anhydride → HCID 24900742, compound

Participants

Reaction Steps

To a solution of 2-amino-9-(2-aminoethyl)-9H-pyrido[2,3-b]indole-3-carboxamide (16, 50.0 mg, 0.186 mmol) in pyridine (2 mL) was added DMAP (23.0 mg, 0.188 mmol) and acetic anhydride (23 μL, 0.243 mmol). The reaction was stirred at RT under an atmosphere of argon. After 1 h, the reaction was concentrated and the crude product was purified by HPLC (Phenomenex Luna 15 μm C18, aqueous NH4OAc/CH3CN) to yield 9-[2-(acetylamino)ethyl]-2-amino-9H-pyrido[2,3-b]indole-3-carboxamide (22, 11 mg, 19%). NH4OAc standard conditions. DAD Retention time =5.18 min. M+H=312. 1H NMR (300 MHz, DMSO-d6): δ 8.73 (s, 1H), 8.01 (t, J=5.7 Hz, 1H), 7.80 (d, J=7.5 Hz, 1H), 7.58 (br s, 2H), 7.46 (d, J=8.1 Hz, 1H), 7.33 (t, J=8.1 Hz, 1H), 7.18 (t, J=7.5 Hz, 1H), 4.31 (t, J=6.0 Hz, 2H), 3.41 (q, J=6.0 Hz, 2H), 1.71 (s, 3H).

Provenance & Evidence