2,3'-Di:fluoro=bi:phenyl cpds. used as precursors for liq. crystal prodn. - prepared by reacting 3-fluoro:boronic acid with 2-fluoro:iodo=benzene in palladium catalyst

摘要

of formula (I): are claimed. Where: L = H or F; X = Cl or Br; Y = F, OCF3 or OCF2H. Also claimed is the use of (I) as liq. crystal precursor cpds. Further claimed is the prepn. of (I).