Dimethylformamide → HCID 10449607, compound

Participants

Reaction Steps

A deoxygenated solution of 4-(5-bromo-2-fluorophenyl)-N,N-dimethyl-2-phenyl-2,5-dihydro-1H-pyrrole-1-carboxamide (2-11, 50 mg, 0.13 mmol, 1 equiv), zinc cyanide (10 mg, 0.85 mmol, 0.66 equiv), tris(dibenzylideneacetone)-dipalladium (12 mg, 0.013 mmol, 0.10 equiv), and 1,1′-bis(diphenylphosphino)-ferrocene (17 mg, 0.031 mmol, 0.24 equiv) in DMF (3 mL) was heated at 110° C. for 3 hours. The reaction mixture was partitioned between brine (50 mL) and ethyl acetate (50 mL). The organic layer was dried over sodium sulfate and concentrated. The residue was purified by flash column chromatography (CH2Cl2 initially, grading to 10% EtOAc in CH2Cl2) to provide 4-(2-fluoro-5-isocyanophenyl)-N,N-dimethyl-2-phenyl-2,5-dihydro-1H-pyrrole-1-carboxamide (13-1) as a pale yellow solid. 1H NMR (500 MHz, CDCl3) δ 7.62 (dd, 1H, j=6.8, 2.0 Hz), 7.59 (m, 1H), 7.33 (m, 4H), 7.26 (m, 1H), 7.22 (dd, 1H, J=10.7, 8.8 Hz), 6.49 (br s, 1H), 6.16 (m, 1H), 4.89 (ddd, 1H, J=13.7, 5.6, 2.0 Hz), 4.55 (d, 1H, J=13.7 Hz), 2.89 (s, 6H). LRMS m/z (M+H) 336.05 found, 336.14 required.

Provenance & Evidence