Bis(triarylmethylium)-mediated diaryl ether synthesis: oxidative arylation of phenols with N,N-dialkyl-4-phenylthioanilines.
Various aryl 4-dialkylaminophenyl ethers were readily synthesized without heating in good yield from phenols and N,N-dialkyl-4-phenylthioanilines. This oxidative arylation of phenols was successfully promoted by a bis(diphenylmethylium)naphthalenediyl dication via ipso-substitution of the phenylthio group in the anilines through a radical process.
Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Terunobu
T
Saitoh
Junji
J
Ichikawa