Quinone → HCID 20089837, compound

Participants

Reaction Steps

A mixture of 1.64 g (0.01 mmol) of 5-trifluoromethyl-2-oxo-2H-pyrane and 5.4 g (0.05 mol) of 1,4-benzoquinone in 7 ml of 1,2-dichlorobenzene is heated for 12 hours to 180° C. The reaction mixture is then concentrated by evaporation at 90°/20 mbar, and the distillation residue is chromatographed over 150 g of silica gel 60 (eluant: 19:1 mixture of CH2Cl2 /acetone; 0.3 bar overpressure). Yield: 1.82 g (80.52%); m.p. 80°-85° C.

Provenance & Evidence