A liquid crystal compound and a mixture containing the same
申请人:Chisso Corporation
公开号:EP0325796A1
公开(公告)日:1989-08-02
A liquid crystalline compound and a liquid crystal composition containing the compound usable for liquid crystal display devices are provided, which liquid crystalline compound is expressed by the formula
wherein R1 is H or 1-20C alkyl or alkenyl wherein one -CH2- group or two -CH2- groups not adjacent to each other may be substituted by -0-; the position and number of the double bond may be optionally chosen; A1, A2 and A3 each are
and the H of the
may be substituted by F, Cℓ or methyl; B1 and B2 each are -CH2CH2-, -CH20-, -OCH2 or a single bond; n is 0 or 1; and m is 0-20.
Palladium-Catalyzed Direct Approach to α-Trifluoromethyl Alcohols by Selective Hydroxylfluorination of <i>gem</i>
-Difluoroalkenes
作者:Bin Zhang、Xiaofei Zhang、Jian Hao、Chunhao Yang
DOI:10.1002/ejoc.201800468
日期:2018.9.30
A mild and efficient synthesis of α‐trifluoromethyl alcohols derivatives was achieved via Pd‐catalyzed selective hydroxylfluorination of gem‐difluoroalkenes using NFSI as the fluoride source.