A new class of aromaticmetamorphosis has been developed in which dibenzofurans were converted into triphenylenes. This transformation is composed of three successive operations: (1) nickel-catalyzed ring-opening C–O bond arylation with arylmagnesium bromides, (2) trifluoromethanesulfonylation (triflation) of the resulting hydroxy moiety with Tf2O, and (3) palladium-catalyzed or photoinduced ring closure
The present invention addresses the problem of providing; a novel bisphenol compound having an indoline skeleton; and a novel aromatic polycarbonate which uses this bisphenol compound as a starting material dihydroxy compound. The above-described problem is able to be solved by an aromatic polycarbonate that contains a repeating unit represented by general formula (2).
Palladium-catalyzed, hydroxy-group-directed C–H arylation of [1,1′-biphenyl]-2-ols with chloroarenes was performed. The reaction showed a broad substrate scope and was successfully applied to pharmaceuticals containing a chloro group. Using 2-heteroarylphenols instead of [1,1′-biphenyl]-2-ols also yielded the desired products. The arylated product was further transformed into a triphenylene derivative
The present invention addresses the problem of providing; a novel bisphenol compound having an indoline skeleton; and a novel aromatic polycarbonate which uses this bisphenol compound as a starting material dihydroxy compound. The above-described problem is able to be solved by an aromatic polycarbonate that contains a repeating unit represented by general formula (2).
Repetitive Synthetic Method for<i>o</i>,<i>o</i>,<i>p</i>-Oligophenylenes Using C–H Arylation
作者:Kei Manabe、Takeshi Kimura
DOI:10.1021/ol303327k
日期:2013.1.18
A synthetic method for the preparation of o,o,p-oligophenylenes has been developed. It involves Miura's C-H arylation of 2-biphenols with aryl nonaflates as the key step. Oligophenylenes with defined lengths are successfully synthesized using this method.