Yc. Yuan et al., DIRECT SYNTHESES OF ETHERS IN THE PRESENCE OF QUATERNARY AMMONIUM-SALTS UNDER MICROWAVE IRRADIATION, Gazzetta chimica italiana, 123(9), 1993, pp. 519-520
Several ethers have been synthesized directly from alcohols and alkyl
halides without an additional base, in the presence of a quaternary am
monium salt, under microwave irradiation, within a few minutes.