A composition comprising at least one type of liquid crystal
申请人:Sony Deutschland GmbH
公开号:EP1840188A2
公开(公告)日:2007-10-03
The present invention relates to a composition comprising at least one type of liquid crystal, to a liquid crystal cell and liquid crystal display device comprising such composition and to a method of preparing such a composition and/or such a liquid crystal cell.
Sterically Controlled Alkylation of Arenes through Iridium-Catalyzed CH Borylation
作者:Daniel W. Robbins、John F. Hartwig
DOI:10.1002/anie.201208203
日期:2013.1.14
one‐pot method for the site‐selective alkylation of arenes controlled by steric effects is reported. The process occurs through Ir‐catalyzed CHborylation, followed by Pd‐ or Ni‐catalyzed coupling with alkyl electrophiles. This selectivity complements that of the typical Friedel–Crafts alkylation; meta‐selective alkylation of a broad range of arenes with various electronic properties and functional