Ethyl chloroformate → HCID 86705398, compound

Participants

Reaction Steps

Sodium hydride in mineral oil (60%, 25 mg, 0.61 mmol) was added to 2-amino-5-(((2S,6R)-2,6-dimethylmorpholino)methyl)nicotinonitrile (100 mg, 0.41 mmol) in THF (2 mL) and the mixture was stirred for 5 minutes. Ethyl chloroformate (0.05 mL, 0.48 mmol) was added followed by additional sodium hydride (16 mg, 0.41 mmol) and the reaction stirred at room temperature for 3 h. The reaction was poured into a saturated solution of sodium bicarbonate (10 mL), extracted with EtOAc (3×5 mL), dried (Na2SO4) and concentrated under reduced pressure. The residue was taken up in methanol (10 mL) and stirred with potassium carbonate (170 mg) for 10 minutes, then poured into saturated sodium bicarbonate (10 mL) and extracted with EtOAc (3×5 mL). The combined organic layers were dried (Na2SO4) and concentrated under reduced pressure. Purification (FCC, SiO2, 0-100%, EtOAc/hexanes) afforded the title compound as a white powder (104 mg, 80%). 1H NMR (400 MHz, DMSO-d6) δ 1.04 (d, J=6.27 Hz, 6H), 1.26 (t, J=7.03 Hz, 3H), 1.69 (t, J=10.60 Hz, 2H), 2.67 (d, J=10.67 Hz, 2H), 3.51 (s, 2H), 3.54-3.62 (m, 2H), 4.17 (q, J=7.11 Hz, 2H), 8.12-8.24 (m, 1H), 8.56 (d, J=2.01 Hz, 1H), 10.37 (s, 1H).

Provenance & Evidence