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1. 发明申请

US20080146813A1 Facile synthesis of a series of liquid crystalline 2-(4'-alkylphenyl)-5-cyanopyridines 有权
标题翻译：一系列液晶2-（4'-烷基苯基）-5-氰基吡啶的简便合成
公开(公告)号：US20080146813A1
公开(公告)日：2008-06-19
申请号：US11609910
申请日：2006-12-13
申请人： Win-Long Chia , Ru-Sung Lu
发明人： Win-Long Chia , Ru-Sung Lu
IPC分类号： C07D211/04
CPC分类号： C07D213/85
摘要： The invention relates to a facile synthesis of a series of 2-(4′-alkylphenyl)-5-cyanopyridine liquid crystal compounds which are represented by the following formula (I): wherein Cn is a linear alkyl having 1-12 carbon atoms. The synthesis of the liquid crystalline 2-(4′-alkylphenyl)-5-cyanopyridine is completed in a two-step reaction. First, a Grignard reagent (such as 4-alkylphenylmagnesium 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′-alkylphenyl)-5-cyanopyridine.
摘要翻译：本发明涉及由下式（I）表示的一系列2-（4'-烷基苯基）-5-氰基吡啶液晶化合物的容易合成：其中C n是直链具有1-12个碳原子的烷基。液晶2-（4'-烷基苯基）-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-烷基苯基溴化镁），得到1,2-二氢吡啶。然后用邻氯醌氧化1,2-二氢吡啶，得到2-（4'-烷基苯基）-5-氰基吡啶。

2. 发明授权

US07465802B2 Facile synthesis of a series of liquid crystalline 2-(4′-alkylphenyl)-5-cyanopyridines 有权
标题翻译：一系列液晶2-（4'-烷基苯基）-5-氰基吡啶的简便合成
公开(公告)号：US07465802B2
公开(公告)日：2008-12-16
申请号：US11609910
申请日：2006-12-13
申请人： Win-Long Chia , Ru-Sung Lu
发明人： Win-Long Chia , Ru-Sung Lu
IPC分类号： C07D213/84 , C09K19/34
CPC分类号： C07D213/85
摘要： The invention relates to a facile synthesis of a series of 2-(4′-alkylphenyl)-5-cyanopyridine liquid crystal compounds which are represented by the following formula (I): wherein Cn is a linear alkyl having 1-12 carbon atoms. The synthesis of the liquid crystalline 2-(4′-alkylphenyl)-5-cyanopyridine is completed in a two-step reaction. First, a Grignard reagent (such as 4-alkylphenylmagnesium 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′-alkylphenyl)-5-cyanopyridine.
摘要翻译：本发明涉及由下式（I）表示的一系列2-（4'-烷基苯基）-5-氰基吡啶液晶化合物的容易合成：其中C n是具有1-12个碳原子的直链烷基。液晶2-（4'-烷基苯基）-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-烷基苯基溴化镁），得到1,2-二氢吡啶。然后用邻氯醌氧化1,2-二氢吡啶，得到2-（4'-烷基苯基）-5-氰基吡啶。

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