1547491-70-2Relevant articles and documents
Benzene type liquid crystal compound and preparation method thereof
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, (2021/09/29)
The invention relates to the technical field of liquid crystal compounds, in particular to a benzene liquid crystal compound and a preparation method thereof, wherein the benzene type liquid crystal compound is N. 4 , N4 , N4 ’ , N4 ’ - (9, 9 - Diphenyl - 9H - fluorene -3 - yl) -2 - methyl - [1, 1 ’ - biphenyl] -4, 4 ’ - diamine, the preparation method of the benzene type liquid crystal compound is that 2 - nitrobenzoic acid is used as a starting material to react with oxalyl chloride to obtain 2 - nitrobenzoyl chloride. The reaction was again reacted with bromobenzene to give (4 - bromophenyl) (2 - nitrophenyl) methyl ketone. The reduction reaction is followed by obtaining (4 - bromophenyl) (2 - aminophenyl) methyl ketone. The 3 - bromo - 9H - fluorene -9 - ketone is obtained by using sulfuric acid and sodium nitrite as a catalyst. The Grignard reagent of bromobenzene is reacted again to obtain 3 - bromo -9, 9 - diphenyl - 9H - fluorene. Reaction with cuprous iodide gives 3 - iodine -9, 9 - diphenyl - 9H - fluorene. 2 - Methyl - [1, 1 ’ - biphenyl] -4, 4 ’ - diamine was prepared, and then reacted with 3 - iodine -9, 9 - diphenyl - 9H - fluorene to obtain the benzene-based liquid crystal compound of the present invention. The invention can be applied to preparation of liquid crystal mixtures, liquid crystal display device materials or electro-optical display device materials.
An organic electronic elements and their dialkylfluorene contg.
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Paragraph 0165; 0166, (2016/10/08)
The present invention relates to certain fluorenes, to the use of the compounds in an electronic device, and to an electronic device comprising at least one of these compounds. The present invention furthermore relates to a process for the preparation of the compounds and to a formulation and composition comprising one or more of the compounds.
