Phenyl-pyrimidines of the formula ##STR1## wherein R.sub.1 and R.sub.2 are as hereinafter set forth, are described. The end products are useful as liquid crystals.
A novel phenylpyrimidinecarboxylate derivative which, when used as a component of liquid crystal compositions, can raise the clearing point of the mesomorphic range of the liquid crystal compositions and/or increase the dielectric anisotropy value of the compositions, and a liquid crystal compositions containing the derivative are provided, which derivative is expressed by the formula ##STR1## wherein X.sup.1 represents an alkyl or alkoxy each of 1-10 C; X.sup.2 represents a 4-substituted phenylk having an alkyl, of 1-10 C, F, Cl, Br or --CN at 4-position or a 3,4-disubstituted phenyl having F, Cl, Br or Cn at 4-position and F, Cl or Br at 3-position; and L represents a N atom and M represents a C atom.
Push-Pull Systems Based on 2,4,6-Triarylpyrimidines. 2,4-Diaryl-6- and 2-Aryl-4,6-bis{4-[(E)-2-arylvinyl]phenyl}pyrimidines
作者:A. A. Harutyunyan、M. S. Safaryan、S. V. Dilanyan、H. A. Panosyan、G. G. Danagulyan
DOI:10.1134/s1070428023020045
日期:2023.2
Abstract Previously unknown 2,4,6-triarylpyrimidines were synthesized by the condensation of benzamidine and 4-(methyl-, 4-butoxy)benzamidine hydrochlorides with (E)-1,3-diaryl-2-propen-1-ones in alcohol in the presence of KOH. The products were reacted with (E)-N-(2-chlorophenyl)-1-arylmethanimines in the KOH/LiH/DMF system to give 2,4-diaryl-6- and 2-aryl-4,6-bis4-[(E)-2-arylvinyl]phenyl}pyrimidines
摘要 以前未知的 2,4,6-三芳基嘧啶是通过苯甲脒和 4-(甲基-, 4-丁氧基)苯甲脒盐酸盐与 ( E )-1,3-diaryl-2-propen-1-ones 在乙醇中缩合合成的KOH 的存在。产物在 KOH/LiH/DMF 体系中与 ( E )-N- ( 2-chlorophenyl)-1-arylmethanimes 反应得到 2,4-diaryl-6- and 2-aryl-4,6-bis4 -[( E )-2-芳基乙烯基]苯基}嘧啶。
Tetrahydrochinazoline, Verfahren zu ihrer Herstellung, diese enthaltende flüssigkristalline Dielektrika und elektrooptisches Anzeigeelement
申请人:MERCK PATENT GmbH
公开号:EP0031021A1
公开(公告)日:1981-07-01
Tetrahydrochinazotine der Formel(1)
worin R1 Alkyl, Alkoxy, Alkanoyloxy oder Alkoxycarbonyloxy mit jeweils bis zu 8 Kohlenstoffatomen, CN, CF3, Halogen oder NO2 und R2 Alkyl mit bis zu 10 Kohlenstoffatomen bedeutet, werden durch Umsetzung eines Hydroxymethylencyclohexanons mit einem Benzamidin in Gegenwart eines basischen Kondensationsmittels hergestellt Sie sind wertvolle Komponenten flüssigkristalliner Dielektrika zur Modifizierung des Temperaturbereichs der nematischen Phase, der Viskosität und der dielektrischen Anisotropie.