Ammonia → 8-Fluoro-9-iodo-3,4,5,6-tetrahydro-4,6-methanobenzo[3,4]cyclohepta[1,2-d]imidazole-2-carboxamide

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Reaction Steps

A solution of ethyl 8-fluoro-9-iodo-3,4,5,6-tetrahydro-4,6-methanobenzo[3,4]cyclohepta[1,2-d]imidazole-2-carboxylate (302 mg at 69% purity) in methanolic ammonia (7 mL of a 7.0M solution of ammonia in methanol, 49.0 mmol) was warmed to 44° C. for 72 hr in a pressure tube. After cooling to room temperature, the precipitous solution was evaporated to dryness in vacuo. The residue was re-suspended in methanol (1 mL) and the solid collected by filtration to furnish the title compound (155 mg, 0.40 mmol, 78%) as an off-white powder: 1H NMR (500 MHz, d6-DMSO) δ 1.47-1.49 (m, 2H), 2.83-2.91 (m, 2H), 3.40-3.44 (m, 1H), 3.60-3.68 (m, 1H), 7.10 (d, J=9.2 Hz, 1H), 7.42 (br. s, 1H), 7.82 (br, s, 1H), 8.64 (d, J=6.9 Hz, 1H), 13.08 (br. s, 1H); M+H=384

Provenance & Evidence