Formic Acid → 3,3,4,4,4-pentafluorobutan-2-yl 4-((4-hydroxy-2-oxo-2H-chromen-3-yl)methyl)benzoate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Formic acid (35.8 ml) was added to 4-Hydroxycoumarin (15.8 g, 97.5 mmol) and aldehyde 3 (28.9 g, 97.6 mmol). Triethylamine (43 ml) was added (exothermic) at 0° C. It was warmed to 140° C. and stirred for 4 h at this temperature. The yellow solution was cooled to rt, ethyl acetate was added, it was washed with 1 N HCl and brine, it was dried over Na2SO4 and the solvent was removed. The slightly yellow solid was recrystallized from ethylacetate to yield the title compound as a white solid in 98% purity (60% yield).

Herkunft & Nachweise