in the 4-po- sition was developed. These valuable fluorinated building blocks were obtained from the corresponding cyclohexanones in a facile and convenient procedure, demonstrated to be superior to the tradi- tional approaches. The application of this methodology to cyclohex- ane-1,4-dione opened access to 2,5-bis(polyfluoroacyl)-1,4- hydroquinones. Structural peculiarities of the obtained phenols
作者:Dmitri V. Sevenard、Olesya Kazakova、Dmitri L. Chizhov、Danil S. Yachevskii、Enno Lork、Jörn Poveleit、Valery N. Charushin、Gerd-Volker Röschenthaler
DOI:10.1002/hlca.200790043
日期:2007.2
3,5-triketones and their metal derivatives towards common halogenating agents was examined, and optimal reaction conditions for the straightforward synthesis of mono-, di-, and tetrahalogenated products were found (Schemes 1–3). An aromatization through a double HBr elimination from an α,α′-dibrominated cyclohexanone was shown to be a promising syntheticroute to 1,1′-(2-hydroxy-1,3-phenylene)bis[2