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
Pd complexes with trans-chelating ligands composed of two pyridyl groups and rigid π-conjugated backbone
作者:Miso Jung、Yuji Suzaki、Takashi Saito、Kyoichi Shimada、Kohtaro Osakada
DOI:10.1016/j.poly.2012.04.006
日期:2012.6
dichloropalladium complex with the trans-chelating ligand, containing two methoxy groups in the central arylene group, promotes coupling of phenyl lithium and of phenyl acetylene to yield the respective homo-coupling products. The ligand displacement reactions of bis(2-pyridylethynyl)benzene}palladium(II) complex with phosphine and dinitrogen ligands, such as PPh3, dppe, dppb, en, tmeda, bpy and phen, takes place
摘要由1,2-二碘苯与2-炔基吡啶的1:2 Sonogashira反应制备了具有两个吡啶基和π共轭骨架的1,2-双(2-吡啶基乙炔基)苯衍生物。所获得的配体与钯(II)配合物如[PdCl 2(cod)]和[PdCl 2(MeCN)2]反应,形成具有以反螯合双齿模式配位的配体的配合物。由1,3-二碘苯和2-炔基吡啶获得的配体桥接两个Pd(II)中心,生成二铝配合物。具有反式螯合配体的二氯钯配合物在中心亚芳基中含有两个甲氧基,可促进苯基锂和苯基乙炔的偶联,从而产生各自的均偶联产物。
Bicyclic Lactams Derived from Serine or Cysteine and 2-Methylpropanal
作者:Mark G. Moloney、Halima Bagum、Bethany R. Shire、Kirsten E. Christensen、Miroslav Genov、Alexander Pretsch、Dagmar Pretsch
DOI:10.1055/s-0039-1691569
日期:2020.3
Bicyclic lactams may be prepared from serine or cysteine and 2-methylpropanal; the resulting S,N-heterocycles are more stable than the corresponding O,N-heterocycles but both are synthetic intermediates capable of further elaboration.
双环内酰胺可由丝氨酸或半胱氨酸和2-甲基丙醛制备;所得的 S,N-杂环比相应的 O,N-杂环更稳定,但两者都是能够进一步加工的合成中间体。
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