Methyl 4-oxo-1,4,5,6-tetrahydrocyclopenta[b]pyrrole-2-carboxylate → HCID 59180059, compound

Participants

Reaction Steps

The title compound was synthesized in two steps. First, methyl 4-oxo-1,4,5,6-tetrahydrocyclopenta[b]pyrrole-2-carboxylate (0.50 g, 2.8 mmol) was reacted with 3,4-dimethyl-benzylmagnesium chloride (0.25 M in THF, 28.0 mL, 7.0 mmol) according to General Procedure 3. The resulting exo-olefin ((E)-methyl 4-(3,4-dimethylbenzylidene)-1,4,5,6-tetrahydrocyclopenta[b]pyrrole-2-carboxylate) was then 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 0-50% EtOAc/heptane to afford the title compound. 0.050 g. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.02-2.19 (m, 1H) 2.19-2.35 (m, 6H) 2.44-2.62 (m, 1H) 2.62-2.87 (m, 4H) 3.19-3.38 (m, 1H) 3.82 (s, 3H) 6.46 (d, J=1.56 Hz, 1H) 6.95 (d, J=7.52 Hz, 1H) 7.00 (s, 1H) 7.07 (d, J=7.42 Hz, 1H) 8.93 (br. s, 1H).

Provenance & Evidence