COMPOUNDS FOR A LIQUID-CRYSTALLINE MEDIUM, AND USE FOR HIGH-FREQUENCY COMPONENTS
申请人:Jasper Christian
公开号:US20120273724A1
公开(公告)日:2012-11-01
The present invention relates to compounds of the formula (I)
where one or more of the radicals A
1-5
denote a 1,4-naphthylene or 1,4-anthracenylene radical, and the other parameters are as defined in Claim
1.
The invention additionally includes liquid-crystalline media which comprise the title compounds, components for high-frequency technology which comprise these media, in particular phase shifters and microwave array antennae.
Compounds for a liquid-crystalline medium, and use for high-frequency components
申请人:Jasper Christian
公开号:US08747695B2
公开(公告)日:2014-06-10
The present invention relates to compounds of the formula (I)
where one or more of the radicals A1-5 denote a 1,4-naphthylene or 1,4-anthracenylene radical, and the other parameters are as defined in Claim 1. The invention additionally includes liquid-crystalline media which comprise the title compounds, components for high-frequency technology which comprise these media, in particular phase shifters and microwave array antennae.
A simple yet effective method for the formation of thiophene-fused π-systems is reported. When arylethynyl-substituted polycyclic arenes were heated in DMF in the presence of elemental sulfur, the corresponding thiophene-fused polycyclic arenes were obtained via cleavage of the ortho-C-H bond. Thus, arylethynylated naphthalenes, fluoranthenes, pyrenes, corannulenes, chrysenes, and benzo[c]naphtho[2