2,3,3',4'-Tetramethyl-benzophenon | 2657-15-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2,3,3',4'-Tetramethyl-benzophenon
• 英文别名: 2,3,3',4'-Tetramethylbenzophenone；(2,3-dimethylphenyl)-(3,4-dimethylphenyl)methanone
• CAS: 2657-15-0
• 化学式: C₁₇H₁₈O
• mdl: MFCD11545577
• 分子量: 238.329
• InChiKey: YRXAZVIHYMKKFD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.7
• 重原子数：
  18
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.235
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  2,3,3',4'-Tetramethyl-benzophenon 在 potassium permanganate 作用下， 以 水 为溶剂， 以80%的产率得到2,3,3',4'-benzophenone tetracarboxylic acid
  参考文献：
  名称：

  Synthesis of asymmetric tetracarboxylic acids and dianhydrides

  摘要：

  本发明涉及制备2,3,3′,4′-四甲基苯酮和不对称二酐（如2,3,3′,4′-苯并二酐（a-BTDA）和3,4′-(六氟异丙基亚甲基)二苯酐（a-6FDA））的组合物和制备过程。a-BTDA是通过用混合酸酐的3,4-二甲基苯甲酸和2,3-二甲基苯甲酸与相应的2,3-二甲基苯基硼酸和3,4-二甲基苯基硼酸进行Suzuki偶联反应来制备的，形成2,3,3′,4′-四甲基苯酮，然后氧化成2,3,3′,4′-苯并四羧酸，最后环化脱水制得a-BTDA。a-6FDA是通过用三氟甲基三甲基硅烷对2,3,3′,4′-四甲基苯酮进行亲核三氟甲基化反应来制备的，形成3,4′-(三氟甲基甲醇)双(邻二甲苯)，然后转化为3,4′-(六氟异丙基亚甲基)-双(邻二甲苯)。3,4′-(六氟异丙基亚甲基)-双(邻二甲苯)被氧化成相应的四羧酸，然后环化脱水得到a-6FDA。

  公开号：

  US07381849B1
• 作为产物：
  描述：

  2,3-二甲基苯硼酸 、 3,4-二甲基苯甲酸 在 palladium catalyst potassium carbonate 、 二甲基二碳酸盐 作用下， 以 1,4-二氧六环 为溶剂， 以33%的产率得到2,3,3',4'-Tetramethyl-benzophenon
  参考文献：
  名称：

  Synthesis of asymmetric tetracarboxylic acids and dianhydrides

  摘要：

  本发明涉及制备2,3,3′,4′-四甲基苯酮和不对称二酐（如2,3,3′,4′-苯并二酐（a-BTDA）和3,4′-(六氟异丙基亚甲基)二苯酐（a-6FDA））的组合物和制备过程。a-BTDA是通过用混合酸酐的3,4-二甲基苯甲酸和2,3-二甲基苯甲酸与相应的2,3-二甲基苯基硼酸和3,4-二甲基苯基硼酸进行Suzuki偶联反应来制备的，形成2,3,3′,4′-四甲基苯酮，然后氧化成2,3,3′,4′-苯并四羧酸，最后环化脱水制得a-BTDA。a-6FDA是通过用三氟甲基三甲基硅烷对2,3,3′,4′-四甲基苯酮进行亲核三氟甲基化反应来制备的，形成3,4′-(三氟甲基甲醇)双(邻二甲苯)，然后转化为3,4′-(六氟异丙基亚甲基)-双(邻二甲苯)。3,4′-(六氟异丙基亚甲基)-双(邻二甲苯)被氧化成相应的四羧酸，然后环化脱水得到a-6FDA。

  公开号：

  US07381849B1

文献信息

• BASE GENERATOR
  申请人：Eternal Chemical Co., Ltd.

  公开号：US20130172569A1

  公开（公告）日：2013-07-04

  The present invention provides a base generator having the structure of formula (1): wherein R 1 , R 2 , R 3 , R 4 , R 5 , and Y circle around (−)} are defined as in the specification. The base generator of the present invention can be used for imidization of a polyimide precursor, promoting crosslinking of epoxy monomers, or crosslinking of polyurethane or polyurea.

  本发明提供了一种具有公式（1）结构的碱发生器： 其中R1、R2、R3、R4、R5和Ycircle around (−)}如说明书中所定义。本发明的碱发生器可用于聚酰亚胺前体的酰亚胺化，促进环氧单体交联，或聚氨酯或聚脲的交联。
• PROCESS FOR PRODUCING AROMATIC POLYCARBOXYLIC ACID
  申请人：Shibamoto Akihiro

  公开号：US20110071314A1

  公开（公告）日：2011-03-24

  A process for producing an aromatic polycarboxylic acid in which all alkyl groups are converted into carboxyl groups in a high yield by decreasing a residual amount of an intermediate product is provided. The process comprises oxygen-oxidizing an aromatic compound having a plurality of alkyl groups (e.g., durene) in the presence of a catalyst containing a cyclic imino unit having an N—OR group (wherein R represents a hydrogen atom or a protecting group for a hydroxyl group) and a transition metal co-catalyst (e.g., a cobalt compound, a manganese compound, and a zirconium compound) under heating in a lower-temperature zone and a higher-temperature zone to produce an aromatic polycarboxylic acid in which a plurality of alkyl groups are oxidized into carboxyl groups. In an initial stage of the reaction, the reaction may be conducted in a first lower-temperature zone (a reaction temperature of 60 to 120° C. and a second lower-temperature zone (an intermediate temperature zone) (a reaction temperature of 100 to 140° C.); and then, in a latter stage of the reaction, the reaction may be conducted in a higher-temperature zone (a reaction temperature of 110 to 150° C.).

  提供一种生产芳香族多羧酸的方法，其中所有烷基转化为羧基，产率高，通过减少中间产物的残留量实现。该方法包括在低温区和高温区加热的条件下，在催化剂的存在下，将具有多个烷基的芳香化合物（例如二甲苯）进行氧气氧化，其中催化剂包含具有N-OR基团（其中R代表氢原子或羟基的保护基团）和过渡金属共催化剂（例如钴化合物、锰化合物和锆化合物）的环状亚胺单元，以产生芳香族多羧酸，其中多个烷基被氧化为羧基。在反应的初始阶段，反应可以在第一低温区（反应温度为60至120°C）和第二低温区（中间温度区）（反应温度为100至140°C）进行；然后，在反应的后期阶段，反应可以在较高温度区（反应温度为110至150°C）进行。
• Polyimides derived from novel asymmetric dianhydrides
  申请人：The United States of America as represented by the Administrator of National Aeronautics and Space Administration

  公开号：US08093348B1

  公开（公告）日：2012-01-10

  This invention relates to the compositions and processes for preparing thermoset and thermoplastic polyimides derived from novel asymmetrical dianhydrides: specifically 2,3,3′,4′ benzophenone dianhydride (a-BTDA), and 3,4′-(hexafluoroisopropylidene)diphthalic anhydride (a-6FDA). The a-BTDA anhydride is prepared by Suzuki coupling with catalysts from a mixed anhydride of 3,4-dimethylbenzoic acid or 2,3-dimethylbenzoic acid with 2,3-dimethylphenylboronic acid or 3,4-dimethylphenylboronic acid respectively, to form 2,3,3′,4′-tetramethylbenzophenone which is oxidized to form 2,3,3′,4′-benzophenonetetracarboxylic acid followed by cyclodehydration to obtain a-BTDA. The a-6FDA is prepared by nucleophilic triflouoromethylation of 2,3,3′,4′-tetramethylbenzophenone with trifluoromethyltrimethylsilane to form 3,4′-(trifluoromethylmethanol)-bis(o-xylene) which is converted to 3,4′-(hexafluoroisopropylidene-bis(o-xylene). The 3,4′-(hexafluoroisopropylidene)-bis(o-xylene) is oxidized to the corresponding tetraacid followed by cyclodehydration to yield a-6FDA.

  本发明涉及由新型非对称二酐衍生的热固性和热塑性聚酰亚胺的组成和制备方法，具体来说是2,3,3′,4′-苯并酮二酐（a-BTDA）和3,4′-(六氟异丙基亚甲基)二苯酐（a-6FDA）。a-BTDA二酐通过使用催化剂从3,4-二甲基苯甲酸或2,3-二甲基苯甲酸与2,3-二甲基苯基硼酸或3,4-二甲基苯基硼酸的混合酸酐进行铃木偶联反应制备而成，形成2,3,3′,4′-四甲基苯并酮，然后氧化形成2,3,3′,4′-苯并酮四羧酸，最后进行环化脱水反应得到a-BTDA。a-6FDA通过三氟甲基化反应将2,3,3′,4′-四甲基苯并酮与三氟甲基三甲基硅烷进行亲核反应制备而成，形成3,4′-(三氟甲基甲醇)-双邻二甲苯，然后转化为3,4′-(六氟异丙基亚甲基)-双邻二甲苯。3,4′-(六氟异丙基亚甲基)-双邻二甲苯被氧化成相应的四羧酸，随后进行环化脱水反应得到a-6FDA。
• POLYIMIDE PRECURSOR, POLYIMIDE, AND LIQUID CRYSTAL ALIGNING AGENT
  申请人：Nagao Masato

  公开号：US20120088888A1

  公开（公告）日：2012-04-12

  To provide a novel polyimide precursor or polyimide which can provide a liquid crystal alignment film having a low volume resistivity, a liquid crystal aligning agent containing these polymers, a liquid crystal alignment film and a novel diamine which is useful as the starting material of these polymers. A polyimide precursor having polymerized units represented by the formula (1), and characterized by satisfying any one of the following (i) to (iii): (i) the structure of X, Y or each of them in formula (1) has a group represented by the following formula (2); (ii) R 2 , R 3 or each of them in formula (1) is a group represented by the following formula (2); (iii) the structure of X, Y or each of them in formula (1) has a group represented by the following formula (2), and R 2 , R 3 or each of them is a group represented by following formula (2):

  提供一种新型聚酰亚胺前体或聚酰亚胺，可提供具有低体积电阻率的液晶取向膜，包含这些聚合物的液晶取向剂，液晶取向膜和一种新型二胺，作为这些聚合物的起始材料。聚酰亚胺前体具有由式（1）表示的聚合单元，其特征在于满足以下任一条件（i）至（iii）中的任一条件：（i）式（1）中的X、Y或它们中的每一个具有以下式（2）表示的基团的结构；（ii）式（1）中的R2、R3或它们中的每一个是以下式（2）表示的基团；（iii）式（1）中的X、Y或它们中的每一个具有以下式（2）表示的基团的结构，而R2、R3或它们中的每一个是以下式（2）表示的基团。
• Polyimides derived from novel asymmetric benzophenone dianhydrides
  申请人：Chuang Chun-Hua

  公开号：US08993710B1

  公开（公告）日：2015-03-31

  This invention relates to the composition and processes for preparing thermoset polyimides derived from an asymmetric dianhydride, namely 2,3,3′,4′-benzophenone dianhydride (a-BTDA) with at least one diamine, and a monofunctional terminal endcaps. The monofunctional terminating groups include 4-phenylethynylphthalic anhydride ester-acid derivatives, phenylethyl trimellitic anhydride (PETA) and its ester derivatives as well as 3-phenylethynylaniline. The process of polyimide composite comprises impregnating monomer reactants of dianhydride or its ester-acid derivatives, diamine and with monofunctional reactive endcaps into glass, carbon, quartz or synthetic fibers and fabrics, and then stack up into laminates and subsequently heated to between 150-375° C. either at atmosphere or under pressure to promote the curing and crosslinking of the reactive endcaps to form a network of thermoset polyimides.

  本发明涉及由不对称二酸酐，即2,3,3′,4′-苯并酮二酸酐（a-BTDA）与至少一种二胺以及单官能末端盖组成的热固性聚酰亚胺的组成和制备工艺。单官能末端基包括4-苯乙炔基邻苯二甲酸酐酯酸衍生物、苯乙基三甲苯酸酐（PETA）及其酯衍生物以及3-苯乙炔基苯胺。聚酰亚胺复合材料的制备过程包括将二酸酐或其酯酸衍生物、二胺和单官能反应末端盖的单体反应物浸渍到玻璃、碳、石英或合成纤维和织物中，然后叠合成层压板，随后在大气压或压力下加热至150-375℃，以促进反应末端盖的固化和交联，形成热固性聚酰亚胺网络。