Herein, we report the challenging and scantily explored Friedel-Crafts alkylation of electron-deficient arenes using a “catalyst activation” approach. Through strong hydrogen bonding with solvent hexafluoroisopropanol (HFIP) the Brønsted acidity of the catalyst is increased which stabilizes the transition states of the Friedel-Crafts reaction via concerted mechanism.
Polyethers based on 9,9-BIS-perfluoroalkyl-3,6-dihydroxy-xanthene or 9-aryl-9-perfluoroalkyl-3,6-dihydroxy-xanthene
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0518196A1
公开(公告)日:1992-12-16
Polyethers based on 9,9-bis-perfluoroalkyl-3,6-dihydroxy-xanthene or 9-aryl-9-perfluoroalkyl-3,6-dihydroxy-xanthene and another constituent selected from aryl sulfone, aryl ketone, benzonitrile, and imide. These polyethers are useful as dielectric films in electronic devices.
Synthesis and Characterization of Fluorinated Bisphenols and Tetraphenols via a Simple One-Pot Reaction
作者:Liming Tao、Haixia Yang、Jingang Liu、Lin Fan、Shiyong Yang
DOI:10.1080/00397911.2012.705214
日期:2013.9.2
Abstract Fluorinated bisphenols and tetraphenols have been prepared by the condensation reaction of trifluoromethyl activated ketones with simple bisphenols (including catechol, resorcinol, and hydroquinone) catalyzed by trifluoromethanesulfonic acid, in good yields. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications® to view the