(+/-)-2-Isopropyl-2-methyl-bernsteinsaeure | 5703-04-8

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (+/-)-2-Isopropyl-2-methyl-bernsteinsaeure
• 英文别名: 2-Isopropyl-2-methyl-bernsteinsaeure (7)；(+/-)-α-Methyl-α-isopropylsuccinic Acid；α-Methyl-α-isopropyl-bernsteinsaeure；(+/-)-2-Methyl-2-isopropyl-bernsteinsaeure；2-isopropyl-2-methyl-succinic acid；Butanedioic acid, 2-methyl-2-(1-methylethyl)-；2-methyl-2-propan-2-ylbutanedioic acid
• CAS: 5703-04-8
• 化学式: C₈H₁₄O₄
• 分子量: 174.197
• InChiKey: ZTPFWDMGYSWDAI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 重原子数：
  12
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  74.6
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (+/-)-2-Isopropyl-2-methyl-bernsteinsaeure 在 chromium(VI) oxide 、 硫酸 作用下， 生成 (3S)-2,2,3-trimethyl-5-oxo-tetrahydro-furan-3-carboxylic acid
  参考文献：
  名称：

  Porath, Arkiv foer Kemi, 1949, vol. 1, p. 385,390

  摘要：

  DOI：
• 作为产物：
  描述：

  alkaline earth salt of/the/ methylsulfuric acid 在 potassium permanganate 、 溶剂黄146 作用下， 生成 (+/-)-2-Isopropyl-2-methyl-bernsteinsaeure
  参考文献：
  名称：

  The Structure of Umbellulone Dibromide¹

  摘要：

  DOI：

  10.1021/ja01101a005

文献信息

• The chemistry of fungi. Part LXVIII. Absolute configuration of 2-iso-propyl-2-methyl-succinic and -glutaric acids: some resultant stereo-chemical corrections
  作者：M. R. Cox、H. P. Koch、W. B. Whalley

  DOI：10.1039/p19730000174

  日期：——

  (+)-2-Isopropyl-2-methylglutaric acid has been prepared from (+)-2-isopropyl-2-methylsuccinic acid. The absolute configuration of these acids has been defined as S by an X-ray crystallographic examination of (+)-rubidium 1-methyl 2-isopropyl-2-methylsuccinate.

  由（+）-2-异丙基-2-甲基琥珀酸制备了（+）-2-异丙基-2-甲基戊二酸。这些酸的绝对构型已经通过（+）-methyl甲基1-甲基-2-异丙基-2-甲基琥珀酸酯的X射线晶体学检查定义为S。
• PROPYLENE RESIN COMPOSITION FOR RETORT POUCH-PACKAGING FILM
  申请人：Basell Poliolefine Italia S.r.l.

  公开号：EP2905309A1

  公开（公告）日：2015-08-12

  An object of the present invention is to provide a propylene resin composition having high processability to stably produce films, and a sealant film for retort pouch-packaging films prepared with the propylene resin composition and having high seal strength. The object is achieved by a propylene resin composition, comprising: a propylene homopolymer, and a propylene-ethylene copolymer dispersed in the propylene homopolymer, the propylene resin composition being prepared through polymerization of propylene and ethylene in the presence of a catalyst comprising: (A) a solid catalyst containing, as essential components, magnesium, titanium, halogen, and an electron donor selected from succinate type compounds, (B) an organoaluminum compound; and (C) an external electron donor selected from silicon compounds, wherein the propylene resin composition contains 25 to 35 wt% ethylene-propylene copolymer, the copolymer contains 60 wt% or more propylene, the propylene resin composition contains a xylene-soluble content having an intrinsic viscosity [η] of 1.8 to 3.2 dl/g, and the propylene resin composition has a melt flow rate of 2.0 to 5.0 g/10 min.

  本发明的目的是提供一种丙烯树脂组合物，该组合物具有较高的加工性，可以稳定地生产薄膜，还提供一种密封膜，该密封膜用于用该丙烯树脂组合物制备的蒸馏袋包装膜，具有较高的密封强度。上述目的是通过一种丙烯树脂组合物实现的，该组合物包括：丙烯均聚物和分散在丙烯均聚物中的丙烯-乙烯共聚物，丙烯树脂组合物是通过丙烯和乙烯在催化剂存在下的聚合反应制备的，催化剂包括： (A) 固体催化剂，其基本成分包括镁、钛、卤素和选自琥珀酸类化合物的电子供体、 (B) 有机铝化合物；以及 (C) 选自硅化合物的外部电子供体，其中丙烯树脂组合物含有 25 至 35 wt% 的乙烯-丙烯共聚物、 该共聚物含有 60 wt%或更多的丙烯、 丙烯树脂组合物含有本征粘度[η]为 1.8 至 3.2 dl/g 的二甲苯可溶物，以及 丙烯树脂组合物的熔体流动速率为 2.0 至 5.0 克/10 分钟。
• Solid catalyst component for use in olefin polymerisation, catalyst, and application thereof
  申请人：BEIJING LIHE TECHNOLOGY LTD

  公开号：US11136421B2

  公开（公告）日：2021-10-05

  Provided in the present invention is a solid catalyst component for use in olefin polymerisation, comprising Mg, Ti, a halogen, and at least one electron donor, the electron donor being a 2-substituted amino-phenyl ester compound selected from general formula (I). Also disclosed in the present invention are a catalyst comprising the solid catalyst component, and an application for the catalyst in olefin polymerisation, particularly in propylene polymerization. Also provided in the present invention is a high activity catalyst, said catalyst being able to obtain polypropylene of high isotacticity and wide molecular weight distribution, and not requiring an external electron donor to obtain high isotacticity polypropylene; during polymerization, Al/Ti and Al/Si are reduced, the polymerization time is lengthened, and high activity can still be maintained, suitable for producing low-ash polymers.

  本发明提供了一种用于烯烃聚合的固体催化剂组分，包括 Mg、Ti、卤素和至少一种电子供体，电子供体为选自通式 (I) 的 2-取代氨基苯基酯化合物。本发明还公开了一种包含固体催化剂组分的催化剂，以及该催化剂在烯烃聚合，特别是丙烯聚合中的应用。本发明还提供了一种高活性催化剂，所述催化剂能够获得高同素异形度和宽分子量分布的聚丙烯，并且不需要外部电子供体即可获得高同素异形度聚丙烯；在聚合过程中，Al/Ti 和 Al/Si 降低，聚合时间延长，仍可保持高活性，适用于生产低灰分聚合物。
• Polyester containing tertiary carboxyl groups, process for its preparation and thermosetting powder compositions containing it
  申请人：——

  公开号：US20030148130A1

  公开（公告）日：2003-08-07

  The invention concerns a polyester bearing tertiary carboxyl groups, characterised in that it consists of: (a) 8.1 to 35 moles of an aliphatic or cycloaliphatic of a polyol; (b) 9.1 to 36 moles of an aliphatic, cycloaliphatic or aromatic polycarboxylic acid; (c) 1.6 to 2.8 moles of an aliphatic, cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group, or a primary or secondary hydroxyl group. Said polyester is prepared in several steps, the first steps consisting in the preparation of a polyester by condensation between (a) an aliphatic or cycloaliphatic polyol, and (b) an aliphatic, cycloaliphatic or aromatic polycarboxylic acid, the final step consisting in condensing said polyester with (c) an aliphatic, cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group, or a primary or secondary hydroxyl group. Said polyester is used in thermosetting powder compositions, mixed with a crosslinking agent which is more particularly a &bgr;-hydroxylalkylarnide. Said compositions provide coatings with excellent surface appearance, good flexibility and good resistance to poor weather conditions.

  本发明涉及一种带有叔羧基的聚酯，其特征在于它包括(a) 8.1 至 35 摩尔的脂肪族或环脂族多元醇； (b) 9.1 至 36 摩尔的脂肪族、环脂族或芳香族多元羧酸； (c) 1.6 至 2.8 摩尔的脂肪族、环脂族或芳香族化合物，该化合物包含一个叔羧基和一个伯或 仲羧基，或一个伯或仲羟基。聚酯的制备分为几个步骤，第一步是通过缩合(a)脂肪族或环脂族多元醇和(b)脂肪族、环脂族或芳香族多羧酸制备聚酯，最后一步是将聚酯与(c)脂肪族、环脂族或芳香族化合物缩合，该化合物包含叔羧基和伯、仲羧基，或伯、仲羟基。所述聚酯用于热固性粉末组合物中，并与交联剂混合，交联剂尤其是羟基烷基酰胺。所述组合物提供的涂层具有极佳的表面外观、良好的柔韧性和良好的耐恶劣气候条件性能。
• Toward the Development of a General Chiral Auxiliary. 9. Highly Diastereoselective Alkylations and Acylations to Form Tertiary and Quaternary Centers
  作者：Robert K. Boeckman,、Debra J. Boehmler、Rhonda A. Musselman

  DOI：10.1021/ol016738i

  日期：2001.11.1

  [GRAPHICS]Enolates of a new camphor-derived lactam auxiliary are shown to monoalkylate with very high diastereoselectivity. A second alkylation occurs with reactive alkylating agents to afford quaternary centers also with high diastereoselectivity, In accord with a proposed model for diastereoselection, lithium and sodium enolates provide products with an opposite sense of asymmetric induction.

表征谱图