Efficient oxidative ipso-fluorination of para-substituted phenols using pyridinium polyhydrogen fluoride in combination with hypervalent iodine(III) reagents
作者:Omar Karam、Agnès Martin-Mingot、Marie-Paule Jouannetaud、Jean-Claude Jacquesy、Alain Cousson
DOI:10.1016/j.tet.2004.05.083
日期:2004.7
4-fluorocyclohexa-2,5-dienones in a good yield. (R,S)-1,1′-Bi-5,6,7,8-tetrahydro-2-naphthol (and its monoacetate) yields atropoisomeric fluorocyclohexadienones. The 4-substituted carbamate open-chain phenols were readily converted to fluorohydroindolenone and fluorohydroquinolenone derivatives by intramolecular conjugate addition.
二乙酰氧基碘苯(PIDA)和双(三氟乙酰氧基)碘苯(PIFA)在吡啶鎓多氟化氢(PPHF)的存在下可有效地氟化对位取代的苯酚,从而以良好的方式生成各种4-氟环己-2,5-二烯酮屈服。(R,S)-1,1′-Bi-5,6,7,8-四氢-2-萘酚(及其单乙酸酯)产生阻转异构的氟代环己二酮。通过分子内共轭物加成,将4-取代的氨基甲酸酯开链酚容易地转化为氟代氢吲哚酮和氟代氢醌烯酮衍生物。