Methyl 4-oxo-1,4,5,6-tetrahydrocyclopenta[b]pyrrole-2-carboxylate → HCID 59180101, compound

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Reaction Steps

The title compound was synthesized in two steps. First, methyl 4-oxo-1,4,5,6-tetrahydrocyclopenta[b]pyrrole-2-carboxylate (0.5 g, 2.79 mmol) was reacted with (3-fluorophenyl)magnesium bromide (14 mL, 6.97 mmol, 0.5 M in THF, 2.5 equiv) according to General Procedure 3. The resulting endo-olefin (methyl 4-(3-fluorophenyl)-1,6-dihydrocyclopenta[b]pyrrole-2-carboxylate) was converted to the title compound by hydrogenation according to General Procedure 6 (with 5% Pd/C). The crude product was purified by column chromatography (Isco CombiFlash) eluting with a gradient of 0-100% EtOAc/heptane to afford the title compound: 150 mg. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.24-2.35 (m, 1H), 2.73-3.01 (m, 3H), 3.84 (s, 3H) 4.22 (t, J=7.13 Hz, 1H), 6.65 (d, J=1.46 Hz, 1H), 6.86-6.93 (m, 2H) 7.00 (d, J=7.66 Hz, 1H), 7.19-7.30 (m, 1H) 9.07-9.28 (m, 1H).

Provenance & Evidence