Hydrochloric Acid → HCID 14770244, compound

Participants

Reaction Steps

To a RB flask equipped with magnetic stirring bar, condenser and N2 inlet line with bubbler was added ethyl 11-formyl-phenanthro[1,2-b]furan-2-carboxylate (15A, 2.5 g, 7.8 mmol), 1N NaOH solution (25 mL), THF (50 mL) and H2O (25 mL). The mixture was refluxed for 2 h until it became homogeneous. The mixture was acidified with 1N HCl and the solvent removed by rotary evaporation. The crude solid was then heated to 150° with copper powder (0.9 g) and quinoline (Aldrich, 25 mL) for 1 h. The reaction mixture was cooled and the quinoline removed under vacuum to give a crude dark green solid. After chromatography and crystallization (CH2Cl2 /hexane) 0.71 g (37% yield) of phenanthro[1,2-b]furan-11-carbaldehyde, mp 145°-150°, (C,H).

Provenance & Evidence