2,3-Dimethylaniline → HCID 22396859, compound

Participants

Reaction Steps

DMAP (60 mg, 0.49 mmol), 2,3-dimethylaniline (0.065 ML, 0.53 mmol) and DIC (0.084 mL, 0.54 mmol) were added to the solution of crude [3-(tert-butoxycarbonyl)-8,9-dichloro-2,3,4,5-tetrahydroazepino[4,5-b]indol-6(1H)-yl]acetic acid (0.20 g, 0.48 mmol) in dry THF (2.5 mL). After 18 h, the reaction was diluted with EtOAc followed by washing with 10% aqueous citric acid, saturated aqueous NaHCO3, and brine. The organic layer was then dried over Na2SO4, decanted, and concentrated. The crude product was first purified by column chromatography (Biotage, 40S, SIM) with CH2Cl2/EtOAc (98:2) to give 0.13 g of impure product. Then, crystallization from EtOAc/heptane gave 96 mg (38%) of a white solid: mp 186-187.5° C.; IR (diffuse reflectance) 3290, 2977, 2939, 1692, 1681, 1662, 1538, 1471, 1450, 1412, 1366, 1338, 1282, 1235, 1163 cm−1; MS (EI) m/z 515 (M+), 375, 373, 226, 225, 223, 120, 84, 76, 56, 51; Anal. Calcd for C27H31Cl2N3O3: C, 62.79; H, 6.05; N, 8.14; found: C, 62.60; H, 6.04; N, 8.07.

Provenance & Evidence