Potassium Carbonate → HCID 57757976, compound

Participants

Reaction Steps

To a solution of 4-amino-5-(4-nitrophenyl)pyrrolo[2,1-f][1,2,4]triazine-6-carbaldehyde (Intermediate H, Step 2) (692 mg, 2.44 mmol) was added tosylmethyl isocyanide (477 mg, 2.44 mmol) and potassium carbonate (338 mg, 2.44 mmol) in MeOH. The solution was allowed to stir at reflux overnight. The solution was dried and diluted with EtOAc (50 mL) and THF (50 mL). Water (50 mL) was added to the reaction mixture. The solution was transferred to a separatory funnel, and the organic layer was isolated and washed with brine (50 mL). The aqueous layers were back extracted with EtOAc (2×50 mL). The combined organic layers were collected, dried (Na2SO4), concentrated onto silica gel, and purified by column chromatography (100% CH2Cl2 ramping to 95:5 v/v CH2Cl2-EtOAc) to afford 310 mg of the above compound as an yellow solid (yield 39%). 1H-NMR (DMSO-d6) δ 11.70 (s, 1H), 8.31 (d, J=8.5 Hz, 2H), 8.28 (s, 1H), 8.17 (s, 1H), 7.66 (d, J=7.1 Hz, 2H), 6.75 (s, 1H); MS [M+H]+=323.2; LCMS RT=2.57 min.

Provenance & Evidence