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    • 2. 发明授权
    • Facile synthesis of a series of liquid crystalline 2-(4′-alkoxyphenyl)-5-cyanopyridines
    • 一系列液晶2-(4'-烷氧基苯基)-5-氰基吡啶的合成
    • US07872143B2
    • 2011-01-18
    • US11760985
    • 2007-06-11
    • Win-Long ChiaYu-Wei Cheng
    • Win-Long ChiaYu-Wei Cheng
    • C07D213/85
    • C07D213/84
    • The invention relates to a facile synthesis of a series of 2-(4′-alkoxyphenyl)-5-cyanopyridine liquid crystal compounds which are represented by the following formula (I): wherein CnH2n+1 is a linear alkyl group having 2-12 carbon atoms. The synthesis of the liquid crystalline 2-(4′-alkoxyphenyl)-5-cyanopyridine is completed in a two-step reaction. First, a Grignard reagent (such as 4-alkoxyphenylmagnesium bromide) is added to a 3-cyanopyridinium salt (such as N-phenyloxycarbonyl-3-cyanopyridinium chloride) to get a 1,2-dihydropyridine. Then, the 1,2-dihydropyridine is oxidized with o-chloronil to obtain the 2-(4′-alkoxyphenyl)-5-cyanopyridine.
    • 本发明涉及一种由下式(I)表示的一系列2-(4'-烷氧基苯基)-5-氰基吡啶液晶化合物的简便合成:其中C n H 2n + 1是具有2-12个碳原子的直链烷基 碳原子。 液晶2-(4'-烷氧基苯基)-5-氰基吡啶的合成在两步反应中完成。 首先,向3-氰基吡啶鎓盐(如N-苯氧基羰基-3-氰基吡啶鎓氯化物)中加入格氏试剂(如4-烷氧基苯基溴化镁),得到1,2-二氢吡啶。 然后,用邻氯苯酚氧化1,2-二氢吡啶,得到2-(4'-烷氧基苯基)-5-氰基吡啶。
    • 6. 发明申请
    • FACILE SYNTHESIS OF A SERIES OF LIQUID CRYSTALLINE 2-(4'-ALKOXYPHENYL)-5-CYANOPYRIDINES
    • 一系列液晶2-(4'-烷氧基苯基)-5-氰基吡啶的合成
    • US20080306276A1
    • 2008-12-11
    • US11760985
    • 2007-06-11
    • Win-Long ChiaYu-Wei Cheng
    • Win-Long ChiaYu-Wei Cheng
    • C07D213/02
    • C07D213/84
    • The invention relates to a facile synthesis of a series of 2-(4′-alkoxyphenyl)-5-cyanopyridine liquid crystal compounds which are represented by the following formula (I): wherein CnH2n+1 is a linear alkyl group having 2-12 carbon atoms. The synthesis of the liquid crystalline 2-(4′-alkoxyphenyl)-5-cyanopyridine is completed in a two-step reaction. First, a Grignard reagent (such as 4-alkoxyphenylmagnesium bromide) is added to a 3-cyanopyridinium salt (such as N-phenyloxycarbonyl-3-cyanopyridinium chloride) to get a 1,2-dihydropyridine. Then, the 1,2-dihydropyridine is oxidized with o-chloronil to obtain the 2-(4′-alkoxyphenyl)-5-cyanopyridine.
    • 本发明涉及一种由下式(I)表示的一系列2-(4'-烷氧基苯基)-5-氰基吡啶液晶化合物的简便合成:其中C n H 2n + 1是具有2-12个碳原子的直链烷基 碳原子。 液晶2-(4'-烷氧基苯基)-5-氰基吡啶的合成在两步反应中完成。 首先,向3-氰基吡啶鎓盐(如N-苯氧基羰基-3-氰基吡啶鎓氯化物)中加入格氏试剂(如4-烷氧基苯基溴化镁),得到1,2-二氢吡啶。 然后,用邻氯苯酚氧化1,2-二氢吡啶,得到2-(4'-烷氧基苯基)-5-氰基吡啶。