Liquid crystal naphtalene compounds, represented by the following formula (1) are disclosed.
R-Z-A-NAP-Z′-R′ (1)
In the formula (1), R is an alkyl group containing 1 to 18 carbon atoms; R′ is an alkyl group containing 1 to 21 carbon atoms; NAP represents 2,6-naphthylene group; A, Z and Z′ are as follows: 1) A is Pyr> and (a) Z is - or # and Z′ is O, or (b) Z is - and Z′ is COO; 2) if A is Pym>, (a) Z is - and Z′ is O, or (b) Z is O and Z′ is -, O or #; 3) A is FPhF and (a) Z is - or O and Z′ is -, O or COO, (b) Z is OCO and Z′ is - or O, or (c) Z is # and Z′ is O; 4) A is PhF and (a) Z is - or # and Z′ is O, (b) Z is O and Z′ is -, or (c) Z is - and Z′ is COO; 5) A is FPh and (a) Z is O and Z′ is-, (b) Z is -, O, # or OCO and Z′ is O, or (c) Z is O and Z′ is COO; 6) A is
液晶
萘化合物的
化学式如下所示:R-Z-A-NAP-Z′-R′。在这个
化学式中,R是含有1到18个碳原子的烷基基团;R′是含有1到21个碳原子的烷基基团;NAP代表2,6-
萘基团;A、Z和Z′的具体定义如下:
1)如果A是Pyr,(a) Z是-或#,Z′是O;或者(b) Z是-,Z′是COO;
2)如果A是Pym,(a) Z是-,Z′是O;或者(b) Z是O,Z′是-、O或#;
3)如果A是FPhF,(a) Z是-或O,Z′是-、O或COO;(b) Z是OCO,Z′是-或O;或者(c) Z是#,Z′是O;
4)如果A是PhF,(a) Z是-或#,Z′是O;(b) Z是O,Z′是-;或者(c) Z是-,Z′是COO;
5)如果A是FPh,(a) Z是O,Z′是-;(b) Z是-、O、#或OCO,Z′是O;或者(c) Z是O,Z′是COO;
6)如果A是
Fluoride-mediated selective cross-coupling reactions of alkyl halides and trimethyl(perfluoroalkyl)silanes, Me3SiRf (Rf=CF3, C2F5) in the absence of any catalysts
作者:Wieland Tyrra、Dieter Naumann、Silke Quadt、Sigrid Buslei、Yurii L. Yagupolskii、Mikhail M. Kremlev
DOI:10.1016/j.jfluchem.2007.02.017
日期:2007.7
A temperature range of −18 °C to room temperature was found to be effective for selective fluoride-mediated cross-coupling reactions of trimethyl(perfluoroalkyl)silanes, Me3SiCF3 and Me3SiC2F5, and alkyl halides, RX (X = Br, I) in the absence of any catalyst.
已发现在−18°C到室温的温度范围内对于三甲基(
全氟烷基)
硅烷Me 3 SiCF 3和Me 3 SiC 2 F 5以及烷基卤化物RX( X = Br,I)在没有任何催化剂的情况下。
4-Hydroxy-5,6-dihydro-1H-pyridin-2-one compounds
申请人:Ellis David
公开号:US20090062263A1
公开(公告)日:2009-03-05
The invention is directed to 4-hydroxy-5,6-dihydro-1H-pyridin-2-one compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
这项发明涉及
4-羟基-5,6-二氢-1H-
吡啶-2-酮化合物和含有这种化合物的药物组合物,可用于治疗丙型肝炎病毒感染。
A Facile New Method for the Two-step Substitution of Hydroxy Groups in Primary Alcohols for Trifluoromethyl and Pentafluoroethyl Moieties
作者:Dmitri V. Sevenard、Peer Kirsch、Gerd-Volker Röschenthaler、Valery N. Movchun、Alexander A. Kolomeitsev
DOI:10.1055/s-2001-11390
日期:——
In an efficient procedure the nucleophilic trifluoromethylation and pentafluoroethylation of alkyl triflates using (trifluoromethyl)- and (pentafluoroethyl)trimethylsilane in the presence of anhydrous tetramethylammonium fluoride is achieved giving 71-80% isolated yields.
在无
水四甲基氟化铵存在下,使用(三
氟甲基)-和(五
氟乙基)三甲基
硅烷对三
氟甲基烷基酯进行亲核的三
氟甲基化和五
氟乙基化反应是一个高效的过程,分离产率为 71-80%。
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