C−H Activation Based Copper‐Catalyzed One‐Shot Synthesis of N,O‐Bidentate Organic Difluoroboron Complexes
作者:Guangying Tan、Malte L. Schrader、Constantin Daniliuc、Felix Strieth‐Kalthoff、Frank Glorius
DOI:10.1002/anie.202008311
日期:2020.11.23
Organic BF2 complexes exhibit characteristics such as large Stokes shift, high quantum yield, strong emission intensity, and robust chemical stability, thereby being extensively used in various applications. Herein, we disclose a novel copper‐catalyzed cascade C−H activation/acyloxylation and difluoroboronation of 2‐phenylpyridine derivatives, thus providing a straightforward and rapid gateway to a
Halogen-containing heterocyclic compounds and liquid crystal compositions containing them
申请人:Chisso Corporation
公开号:EP0233706A2
公开(公告)日:1987-08-26
Liquid crystalline, halogen-containing heterocyclic compounds, useful in liquid crystal composition have the formula:
in which R₁ and R₂ and each represent a C₂-C₁₈ alkyl group, X is -N= or =CH=; Y is F or Cℓ; n is 0 or an integer of l to l0; and the symbol* indicates an asymmetric carbon atom.