Hydrochloric Acid → HCID 22676736, compound

Participants

Reaction Conditions

Reaction Steps

To a 25 mL round-bottomed flask at rt was charged with ethyl 3-(3-aminophenyl)-1-[(3-methoxyphenyl)methyl]indole-2-carboxylate (Example 93, 222 mg, 0.55 mmol) and dichloromethane (1.5 mL). The resulting solution was cooled to 0° C., to which was added pyridine (0.09 mL, 1.1 mmol) and phosgene (20% in toluene, 0.35 mL, 0.66 mmol). The mixture was left stirred at 0° C. for 2 hours and rt for 2 hours before it was concentrated in vacuo. The residue was dissolved in dichloromethane (2 mL) and cyclopropylamine (0.11 mL, 1.65 mmol) was added. The mixture was left at rt for 15 minutes before it was mixed with hydrochloric acid (1 N) and extracted with dichloromethane (10 mL). The organic layer was washed with aqueous sodium bicarbonate, brine, and dried over anhydrous magnesium sulfate. The crude mixture was purified with silica gel flash chromatography using hexane/ethyl acetate (3/1) as the eluant to give ethyl 3-{3-[(cyclopropylamino)carbonylamino]phenyl}-1-[(3-methoxyphenyl)methyl]indole-2-carboxylate (140 mg, 53%): MS (electrospray, MH+) calcd for C29H30N3O4 484.2, found 484.1; 1H NMR (DMSO-d6) δ 8.36 (s, 1H), 7.52-7.64 (m, 3H), 7.15-7.38 (m, 5H) 6.95 (ddd, J=6.9 Hz, 1H), 6.79 (dd, J=8.1, 1.9 Hz, 1H), 6.65 (dd, 1H), 6.59 (d, J=7.6 Hz, 1H), 6.38 (d, J=2.6 Hz, 1H), 5.77 (s, 2H), 4.10 (q, J=7.1 Hz), 3.68 (s, 3H), 2.50-2.60 (m, 1H), 0.97 (t, J=7.1 Hz), 0.60-0.64 (m, 2H), 0.39-0.41 (m. 2H).

Provenance & Evidence