2,3-二乙基丁二酸 | 1186-79-4

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 中文名称: 2,3-二乙基丁二酸
• 中文别名: 2,3-二乙基琥珀酸；2,3-二乙基苯甲酸
• 英文名称: 2,3-diethylbutanedioic acid
• 英文别名: 2,3-Diethylsuccinic acid
• CAS: 1186-79-4
• 化学式: C₈H₁₄O₄
• mdl: MFCD02258550
• 分子量: 174.197
• InChiKey: KJXMXCRSMLOXBM-UHFFFAOYSA-N

物化性质

• 熔点：
  132-133℃
• 密度：
  1.156

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  12
• 可旋转键数：
  5
• 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

安全信息

• 海关编码：
  2917190090

反应信息

• 作为反应物：
  描述：

  2,3-二乙基丁二酸 在 lithium aluminium tetrahydride 作用下， 以 乙醚 为溶剂， 生成 2,3-diethyl-1,4-butanediol
  参考文献：
  名称：

  Conformational Effects and Hydrogen Bonding in 1,4-Diols

  摘要：

  DOI：

  10.1021/ja01058a022
• 作为产物：
  描述：

  丁酸 在 过氧化乙酰 作用下， 生成 2,3-二乙基丁二酸
  参考文献：
  名称：

  Processes for producing dibasic acids and derivatives of dibasic acids

  摘要：

  公开号：

  US02426224A1

文献信息

• Reaction of Lithium Acylate α-Carbanions with Carbon Tetrabromide
  作者：A. V. Zorin、A. T. Zaynashev、V. V. Zorin

  DOI：10.1134/s1070428019100105

  日期：2019.10

  2-methylpropanoic acids with lithium diisopropylamide in THF under argon reacted with carbon tetrabromide at 20-25°C (2 h) to produce butanedioic acid or its 2,3-diethyl and 2,2,3,3-tetramethyl derivatives, as well as the corresponding 2-bromocarboxylic acids and bromoform. The effect of the halogen nature in carbon tetrahalide (CCl4, CBr4) on the reaction selectivity is discussed.

  在氩气下，于氩气中于乙酸中将乙酸，丁酸和2-甲基丙酸与二异丙基氨基锂金属化而生成的酰化锂α-碳负离子，在20-25°C（2 h）下与四溴化碳反应生成丁二酸或其2,3-二乙基和2,2,3,3-四甲基衍生物，以及相应的2-溴羧酸和溴仿。讨论了四卤化碳（CCl4，CBr4）中卤素性质对反应选择性的影响。
• ISOCYANATE TRIMERISATION CATALYST SYSTEM, A PRECURSOR FORMULATION, A PROCESS FOR TRIMERISING ISOCYANATES, RIGID POLYISOCYANURATE/POLYURETHANE FOAMS MADE THEREFROM, AND A PROCESS FOR MAKING SUCH FOAMS
  申请人：Athey Phillip

  公开号：US20110201709A1

  公开（公告）日：2011-08-18

  The instant invention provides an isocyanate trimerisation catalyst system, a precursor formulation, a process for trimerising isocyanates, rigid foams made therefrom, and a process for making such foams. The trimerisation catalyst system comprises: (a) an imidazolium or imidazolinium cation; and (b) an isocyanate-trimer inducing anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C. The precursor formulation comprises: (1) at least 25 percent by weight of polyol, based on the weight of the precursor formulation; (2) less than 15 percent by weight of a trimerisation catalyst system, based on the weight of the precursor formulation, comprising; (a) an imidazolium or imidazolinium cation; and (c) an isocyanate-trimer inducing anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C.; and (3) optionally one or more surfactants, one or more flame retardants, water, one or more antioxidants, one or more auxiliary blowing agents, one or more urethane catalysts, one or more auxiliary trimerisation catalysts, or combinations thereof. The process for trimerisation of isocyanates comprises the steps of: (1) providing one or more monomers selected from the group consisting of an isocyanate, a diisocyanate, a triisocyanatetriisocyanate, oligomeric isocyanate, a salt of any thereof, and a mixture of any thereof; (2) providing a trimerisation catalyst system comprising; (a) an imidazolium or imidazolinium cation; and (b) an isocyanate-trimer inducing anion; (c) wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C.; (3) trimerising said one or more monomers in the presence of said trimerisation catalyst; (4) thereby forming an isocyanurate trimer. The process for making the PIR foam comprises the steps of: (1) providing one or more monomers selected from the group consisting of an isocyanate, a diisocyanate, a triisocyanatetriisocyanate, oligomeric isocyanate, a salt of any thereof, and a mixture any thereof; (2) providing polyol; (3) providing a trimerisation catalyst system comprising; (a) an imidazolium or imidazolinium cation; and (b) an isocyanate-timer inducing anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C.; and (4) optionally providing one or more surfactants, one or more flame retardants, water, one or more antioxidants, one or more auxiliary blowing agents, one or more urethane catalysts, one or more auxiliary trimerisation catalysts, or combinations thereof; (5) contacting said one or more monomers, and said polyol, and optionally said one or more surfactants, and optionally said one or more flame retardants, and optionally said water, and optionally said one or more antioxidants, and optionally said one or more auxiliary blowing agents in the presence of said trimerisation catalyst system and optionally said one or more urethane catalysts, and optionally said one or more auxiliary trimerisation catalysts; (6) thereby forming said polyisocyanurate/polyurethane rigid foam. The PIR foam comprises the reaction product of one or more monomers selected from the group consisting of an isocyanate, a diisocyanate, a triisocyanatetriisocyanate, oligomeric isocyanate, a salt of any thereof, and a mixture any thereof with polyol in the presence of a trimerisation catalyst system comprising an imidazolium or imidazolinium cation, and an isocyanate-trimer inducing anion, and optionally one or more surfactants, optionally one or more flame retardants, optionally water, optionally one or more antioxidants, optionally one or more auxiliary blowing agents, optionally one or more additional urethane catalysts, and optionally one or more auxiliary trimerisation catalysts, or optionally combinations thereof, wherein the trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C. The PIR foam comprises the reaction product of one or more monomers selected from the group consisting of an isocyanate, a diisocyanate, a triisocyanatetriisocyanate, oligomeric isocyanate, a salt of any thereof, and a mixture any thereof with polyol in the presence of a trimerisation catalyst system comprising an imidazolium or imidazolinium cation, and an isocyanate-trimer inducing anion, and optionally one or more surfactants, optionally one or more flame retardants, optionally water, optionally one or more antioxidants, optionally one or more auxiliary blowing agents, optionally one or more additional polyurethane catalysts, and optionally one or more auxiliary trimerisation catalysts, or optionally combinations thereof, wherein the PIR foam has a polyisocyanurate trimer ratio (Abs 1410 /Abs 1595 ) of at least 5 at a depth of 12 mm from the rising surface of the rigid foam, measured via ATR-FTIR spectroscopy.

  该发明提供了一种异氰酸酯三聚催化剂系统、前体配方、异氰酸酯三聚化过程、由此制成的硬质泡沫以及制备此类泡沫的方法。该三聚化催化剂系统包括：(a)咪唑或咪唑啉阳离子；以及(b)异氰酸酯三聚诱导阴离子；其中所述的三聚化催化剂系统具有等于或小于73℃的三聚化活化温度。前体配方包括：(1)聚醚醇，其重量占前体配方重量的至少25%；(2)三聚化催化剂系统，其重量占前体配方重量的15%以下，包括：(a)咪唑或咪唑啉阳离子；(b)异氰酸酯三聚诱导阴离子；其中所述的三聚化催化剂系统具有等于或小于73℃的三聚化活化温度；以及(3)可选的一个或多个表面活性剂、一个或多个阻燃剂、水、一个或多个抗氧化剂、一个或多个辅助发泡剂、一个或多个脲催化剂、一个或多个辅助三聚化催化剂或其组合。异氰酸酯三聚化过程包括以下步骤：(1)提供一种或多种单体，所述单体选自群组中的异氰酸酯、二异氰酸酯、三异氰酸酯三异氰酸酯、寡聚异氰酸酯、任何其中的盐以及任何其中的混合物；(2)提供三聚化催化剂系统，包括：(a)咪唑或咪唑啉阳离子；以及(b)异氰酸酯三聚诱导阴离子；其中所述的三聚化催化剂系统具有等于或小于73℃的三聚化活化温度；(3)在所述三聚化催化剂的存在下，三聚化所述的一种或多种单体；(4)从而形成异氰酸酯三聚体。制备PIR泡沫的方法包括以下步骤：(1)提供一种或多种单体，所述单体选自群组中的异氰酸酯、二异氰酸酯、三异氰酸酯三异氰酸酯、寡聚异氰酸酯、任何其中的盐以及任何其中的混合物；(2)提供聚醚醇；(3)提供三聚化催化剂系统，包括：(a)咪唑或咪唑啉阳离子；以及(b)异氰酸酯三聚诱导阴离子；其中所述的三聚化催化剂系统具有等于或小于73℃的三聚化活化温度；以及(4)可选地提供一个或多个表面活性剂、一个或多个阻燃剂、水、一个或多个抗氧化剂、一个或多个辅助发泡剂、一个或多个脲催化剂、一个或多个辅助三聚化催化剂或其组合；(5)在所述三聚化催化剂系统和可选的一个或多个脲催化剂以及可选的一个或多个辅助三聚化催化剂的存在下，将所述的一种或多种单体、所述的聚醚醇、可选的一个或多个表面活性剂、可选的一个或多个阻燃剂、可选的水、可选的一个或多个抗氧化剂以及可选的一个或多个辅助发泡剂接触；(6)从而形成所述的聚异氰酸酯/聚氨酯硬质泡沫。PIR泡沫是由异氰酸酯、二异氰酸酯、三异氰酸酯三异氰酸酯、寡聚异氰酸酯、任何其中的盐以及任何其中的混合物和聚醚醇在咪唑或咪唑啉阳离子和异氰酸酯三聚诱导阴离子以及可选的一个或多个表面活性剂、可选的一个或多个阻燃剂、可选的水、可选的一个或多个抗氧化剂、可选的一个或多个辅助发泡剂、可选的一个或多个额外脲催化剂以及可选的一个或多个辅助三聚化催化剂或其组合的存在下的反应产物，其中所述的三聚化催化剂系统具有等于或小于73℃的三聚化活化温度。PIR泡沫在距硬质泡沫上升表面12mm处通过ATR-FTIR光谱测量具有聚异氰酸酯三聚体比值(Abs1410/Abs1595)至少为5。
• Tetracarboxylic acid combinations for corrosion inhibition
  申请人：ECOLAB USA, INC.

  公开号：US11149202B1

  公开（公告）日：2021-10-19

  Corrosion inhibitors and methods for reducing or inhibiting corrosion of metals in aqueous systems are provided. Corrosion inhibitor compositions may include tetracarboxylic acids, such as butane tetracarboxylic acid. The compositions may include other components, such as zinc, molybdate, silicate, cerium, among others. The compositions may also include polymers or oligomers. The corrosion inhibitor compositions produced synergistic results and unexpectedly low corrosion rates.

  提供了用于减少或抑制水系金属腐蚀的腐蚀抑制剂和方法。腐蚀抑制剂组合物可能包括四羧酸，例如丁烷四羧酸。组合物可能包括其他成分，例如锌，钼酸盐，硅酸盐，铈等。组合物还可以包括聚合物或寡聚物。产生了协同效应和意外低腐蚀率的腐蚀抑制剂组合物。
• Suppository and composition comprising at least one polyethylene glycol
  申请人：Anestic ApS

  公开号：US20020048601A1

  公开（公告）日：2002-04-25

  There is provided a suppository comprising at least one biocompatible polymer, wherein the biocompatible polymer is essentially non-biodegradable, and wherein the suppository essentially does not swell when contacted with an aqueous fluid. The suppository may further comprise a plurality of open cells at least partly separated from one another by an interpenetrating matrix comprising at least one biocompatible polymer in branched or crosslinked form. The plurality of interlinked, open cells are capable of containing an aqueous fluid, and the permeability of the suppository ensures that entry of body fluids into the open cells under practical circumstances occurs essentially without dehydration of mucousal membrane tissue contacting the suppository. The suppository furthermore preferably comprises a controlled release formulation.

  提供了一种含有至少一种生物相容性聚合物的栓剂，其中该生物相容性聚合物基本上不可生物降解，且当与水性液体接触时，该栓剂基本上不膨胀。该栓剂还可以进一步包括多个开放单元，这些单元至少部分地由相互穿插的基质分隔开，该基质包含至少一种分支或交联形式的生物相容性聚合物。这些互相连接的开放单元能够包含水性液体，而栓剂的渗透性确保体液进入开放单元时，在实际情况下基本上不会导致接触栓剂的粘膜组织脱水。此外，该栓剂最好包含控制释放配方。
• IONIC POLYMERS, METHOD OF MANUFACTURE, AND USES THEREOF
  申请人：Yontz Dorie J.

  公开号：US20120118832A1

  公开（公告）日：2012-05-17

  An ionic polymer of formula VI wherein each b=0 or 1; X is hydrogen, 1/z of a metal ion of charge z, a protonated nitrogen base, or a tetrasubstituted organic ammonium compound; the molar ratio of q:r:s:t=(100-0.1):(0-99.9):(0-50):(0-30); R 1 , R 2 and R 3 are hydrogen or C 1-4 alkyl; R 4 , R 5 , R 6 and R 7 are hydrogen, C 1-4 alkyl or F, wherein F is a functional group that imparts a property to polymer VI, at least one and no more than two of R 4 , R 5 , R 6 and R 7 are F and F is the same or different; G is a single bond or a C 1-30 hydrocarbyl group; and for each instance of t when t is not zero, c=0-5 and d=0-5, provided that c+d=1-5, and wherein q, r and s as present in c are independent of any other value of q, r and s.

  化学式为VI的离子聚合物，其中每个b=0或1；X是氢、带电荷z的金属离子的1/z、质子化的氮碱基或四取代有机铵化合物；q:r:s:t的摩尔比为(100-0.1)∶(0-99.9)∶(0-50)∶(0-30)；R1、R2和R3为氢或C1-4烷基；R4、R5、R6和R7为氢、C1-4烷基或F，其中F是赋予聚合物VI某种性质的官能团，R4、R5、R6和R7中至少有一个且不超过两个为F，F相同或不同；G为单键或C1-30烃基基团；对于每个t的实例，当t不为零时，c=0-5且d=0-5，前提是c+d=1-5，且在c中出现的q、r和s与任何其他q、r和s的值是独立的。