Isopropanol → HCID 16666335, compound

Participants

Reaction Steps

N-Boc-4-pyrrolidin-2-ylbenzoic acid (0.29 g) in dimethylformamide (DMF, 1 mL) and pyridine (1 mL) at 40° C. was stirred for 10 minutes, treated with CDI (0.17 g) stirred for 30 minutes, treated with 2,3-diaminobenzamide dihydrochloride (0.22 g), stirred at ambient temperature for 3.5 hours, treated with isopropanol (2 mL), stirred at ambient temperature for 16 hours, treated with isopropanol (5 mL) and hexanes (40 mL) and decanted. The residue was stirred in water (3 mL) at ambient temperature with 2 drops 50% NaOH for 5 hours and filtered. The filtrant was stirred in acetic acid (3 mL) at reflux for 7.5 hours, cooled and concentrated. The concentrate was stirred in dichloromethane (5 mL) and hexane (15 mL) and filtered. 1H NMR (DMSO-d6) δ 13.35 (br, 1H), 9.35 (br, 1H), 8.18 (br d, J=7.8 Hz, 2H), 7.87 (d, J=7.4 Hz, 1H), 7.75 (br, 1H), 7.72 (d, J=8.2 Hz, 1H), 7.40 (br d, J=8.5 Hz, 2H), 7.34 (t, J=7.8 Hz, 1H), 4.79 (brm, 1H), 3.55 (m, 2H), 2.36 (m, 1H), 1.80 (m, 3H), 1.41 (s, 4H), 1.12 (s, 5H).

Provenance & Evidence