p-Toluenesulfonic acid → 1-Ethoxyethyl ether

Beteiligte Stoffe

Reaktionsschritte

To a slurry of 5.0 g (21 mMol) of 3-carbethoxy-7-hydroxycoumarin [H. Pechmann and E. Graezer, Chem. Ber. 34:378(1901)] in 100 mL of CH2Cl2 containing 5 mL of ethylvinyl ether was added 30 mg of p-toluenesulfonic acid. After 15 minutes, the reaction was poured into 100 mL of 10% potassium hydroxide (KOH) solution. The organic phase was separated, washed with H2O, dried and evaporated. The residue was taken up in toluene and precipitated with hexane to give 1.73 g (26% yield) of the 1-ethoxyethyl ether as a solid, m.p. 70°-71° C.

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