Polyhalogenated biphenyl compound and its liquid crystal monomer

Xue-jun YANG; Wang-cai ZHANG; Yan-wei ZHANG; Wei-song DU; Ai-ai GAO; Guo-jun BIE

doi:10.3788/YJYXS20193412.1143

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Polyhalogenated biphenyl compound and its liquid crystal monomer

Materials and Devices | 更新时间：2020-07-16

- Polyhalogenated biphenyl compound and its liquid crystal monomer
- Chinese Journal of Liquid Crystals and Displays Vol. 34, Issue 12, Pages: 1143-1147(2019)
- 作者机构：
  
  西安彩晶光电科技股份有限公司, 陕西西安 710065
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20193412.1143
  CLC： O625.21
- Received：19 August 2019，
  
  Accepted：09 September 2019，
  
  Published：05 December 2019
- 稿件说明：
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Xue-jun YANG, Wang-cai ZHANG, Yan-wei ZHANG, et al. Polyhalogenated biphenyl compound and its liquid crystal monomer[J]. Chinese journal of liquid crystals and displays, 2019, 34(12): 1143-1147.
DOI：

Xue-jun YANG, Wang-cai ZHANG, Yan-wei ZHANG, et al. Polyhalogenated biphenyl compound and its liquid crystal monomer[J]. Chinese journal of liquid crystals and displays, 2019, 34(12): 1143-1147. DOI： 10.3788/YJYXS20193412.1143.

摘要

以2，3，3'，5'-四氟-1，1'-联苯为原料，在超低温条件下与n-BuLi及CF

反应得到一种新的多卤代联苯类化合物4'-二氟溴甲基-2，3，3'，5'-四氟-4-溴-1，1'-联苯，利用一步反应同时向分子结构中引入-CF

Br和-Br两个不同的官能团，简化了反应步骤。用此化合物作为通用中间体，可以方便地合成多种二氟甲醚桥键类液晶单体，为此类液晶单体的制备提供了一种新的方法，文中用上述方法合成了二氟甲醚桥键类液晶单体3PYUQUF，液晶综合参数测试结果表明，化合物3PYUQUF的Δ

值为0.138 0，Δ

值为22.63。

Abstract

A new polyhalogenated biphenyl compound 4-bromo-4'-(bromodifluoromethyl)-2

5'-tetrafluoro-1

1'-biphenyl was synthesized from 2

5'-tetrafluoro-1

1'-biphenyl by reacting with n-BuLi and CF

under ultra-low temperature. But

this reaction can be simplified to a one-step reaction by constructing two different functional groups -CF

Br and -Br into the molecular structure. As a general intermediate

this compound can be used to synthesize a variety of difluoromethyl ether bridge-bonded liquid crystal monomers

which provides a new method for the preparation of such liquid crystal monomers. In this paper

the difluoromethyl ether bridge-bonded liquid crystal monomer 3PYUQUF was synthesized by the above methods. The results show that the Δ

values of the compound 3PYUQUF was 0.138 0

and the Δ

value was 22.63.

关键词

Keywords

references

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