N-Maleoyl-DL-alanin-ethylester | 14109-70-7

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: N-Maleoyl-DL-alanin-ethylester
• 英文别名: Ethyl 2-(2,5-dioxopyrrol-1-yl)propanoate
• CAS: 14109-70-7
• 化学式: C₉H₁₁NO₄
• 分子量: 197.191
• InChiKey: OZVUJAWNBWYUEP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.2
• 重原子数：
  14
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  63.7
• 氢给体数：
  0
• 氢受体数：
  4

文献信息

• Process for producing polymerizable polybranched polyester
  申请人：Hayakawa Hitoshi

  公开号：US20060047140A1

  公开（公告）日：2006-03-02

  The present invention allows the production of a polymerizable hyperbranched polyester by introducing polymerizable unsaturated double bonds into the molecular terminals of a hyperbranched polyester polyol (A), which is obtained by condensation polymerization a polyhydroxy monocarboxylic acid in which there are at least two hydroxyl groups, the carbon atom adjacent to the carboxy group is saturated carbon atom, and the hydrogen atoms on said carbon atom are all substituted, by reacting the hyperbranched polyester polyol (A) and an alkyl ester of a carboxylic acid having a polymerizable unsaturated double bond (B) by a transesterification in the presence of at least one type of transesterification catalyst (C) selected from the group consisting of a dialkyl tin oxide and a stanoxane, without causing side reactions such as nucleophilic addition reactions of terminal hydroxyl groups to polymerizable unsaturated double bonds of the hyperbranched polyester polyol (A), or thermal polymerization of the polymerizable unsaturated double bonds. The polymerizable hyperbranched polyester can be produced at high efficiency using a transesterification that uses as an alkyl ester of a carboxylic acid having a polymerizable unsaturated double bond (B), which is easily obtained as an industrial raw material, and without altering the original backbone structure of the molecular chains of the hyperbranched polyester polyol (A) by hydrolysis and so forth.

  本发明通过在超支化聚酯多元醇（A）的分子端引入可聚合不饱和双键，从而允许生产可聚合的超支化聚酯。超支化聚酯多元醇（A）是通过缩聚至少含有两个羟基的聚羟基一元羧酸（羧基相邻的碳原子是饱和碳原子，该碳原子上的氢原子均被取代）而获得的。在至少一种转酯化催化剂（C）的存在下，通过将超支化聚酯多元醇（A）和具有可聚合不饱和双键的羧酸烷基酯（B）进行酯交换反应，而不引起末端羟基对超支化聚酯多元醇（A）的可聚合不饱和双键的亲核加成反应或热聚合反应等副反应，就可以高效地生产可聚合的超支化聚酯。使用作为工业原料易于获得的具有可聚合不饱和双键的羧酸烷基酯（B）进行酯交换反应，无需通过水解等改变超支化聚酯多元醇（A）的分子链的原始骨架结构。
• PROCESS FOR PRODUCING POLYMERIZABLE POLYBRANCHED POLYESTER
  申请人：DAINIPPON INK AND CHEMICALS, INC.

  公开号：EP1582548A1

  公开（公告）日：2005-10-05

  The present invention allows the production of a polymerizable hyperbranched polyester by introducing polymerizable unsaturated double bonds into the molecular terminals of a hyperbranched polyester polyol (A), which is obtained by condensation polymerization a polyhydroxy monocarboxylic acid in which there are at least two hydroxyl groups, the carbon atom adjacent to the carboxy group is saturated carbon atom, and the hydrogen atoms on said carbon atom are all substituted, by reacting the hyperbranched polyester polyol (A) and an alkyl ester of a carboxylic acid having a polymerizable unsaturated double bond (B) by a transesterification in the presence of at least one type of transesterification catalyst (C) selected from the group consisting of a dialkyl tin oxide and a stanoxane, without causing side reactions such as nucleophilic addition reactions of terminal hydroxyl groups to polymerizable unsaturated double bonds of the hyperbranched polyester polyol (A), or thermal polymerization of the polymerizable unsaturated double bonds. The polymerizable hyperbranched polyester can be produced at high efficiency using a transesterification that uses as an alkyl ester of a carboxylic acid having a polymerizable unsaturated double bond (B), which is easily obtained as an industrial raw material, and without altering the original backbone structure of the molecular chains of the hyperbranched polyester polyol (A) by hydrolysis and so forth.

  本发明通过在超支化聚酯多元醇（A）的分子末端引入可聚合的不饱和双键来生产可聚合的超支化聚酯，超支化聚酯多元醇（A）是通过缩合聚合多羟基一羧酸得到的，其中至少有两个羟基，与羧基相邻的碳原子是饱和碳原子，并且所述碳原子上的氢原子全部被取代、将超支化聚酯多元醇（A）和具有可聚合不饱和双键的羧酸烷基酯（B）在至少一种酯交换催化剂（C）（选自二烷基氧化锡和链烷氧基）的存在下进行酯交换反应、不引起副反应，如端羟基与超支化聚酯多元醇（A）的可聚合不饱和双键的亲核加成反应，或可聚合不饱和双键的热聚合反应。使用具有可聚合不饱和双键（B）的羧酸烷基酯进行酯交换反应，可高效生产可聚合超支化聚酯，该烷基酯可作为工业原料轻松获得，且不会通过水解等方式改变超支化聚酯多元醇（A）分子链的原始骨架结构。
• US7141642B2
  申请人：——

  公开号：US7141642B2

  公开（公告）日：2006-11-28