乙基甲基丙二酸 | 595-84-6

• 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: 乙基甲基丙二酸
• 英文名称: 2-ethyl-2-methylmalonic acid
• 英文别名: Methyl-ethyl-malonsaeure；Ethylmethylmalonic acid；2-ethyl-2-methylpropanedioic acid
• CAS: 595-84-6
• 化学式: C₆H₁₀O₄
• mdl: MFCD19228077
• 分子量: 146.143
• InChiKey: OGAFKQWRXQJXJD-UHFFFAOYSA-N

物化性质

• 熔点：
  121 °C
• 沸点：
  315.3±25.0 °C(Predicted)
• 密度：
  1.250±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  10
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.666
• 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：

  乙基甲基丙二酸 在 D-酒石酸 作用下， 生成 2-甲基丁酸
  参考文献：
  名称：

  Eisenlohr; Meier, Chemische Berichte, 1938, vol. 71, p. 1005,1006

  摘要：

  DOI：
• 作为产物：
  描述：

  β,β-Dicarbethoxy-n-valeraldehyd 在 sodium hydroxide 、 二叔丁基过氧化物 作用下， 生成 乙基甲基丙二酸
  参考文献：
  名称：

  1,2-Migrations in alkyl radicals

  摘要：

  DOI：

  10.1021/jo00975a003

文献信息

• [EN] FAR SUPERIOR OXIDATION CATALYSTS BASED ON MACROCYCLIC COMPOUNDS<br/>[FR] CATALYSEURS D'OXYDATION NETTEMENT SUPÉRIEURS À BASE DE COMPOSÉS MACROCYCLIQUES
  申请人：UNIV CARNEGIE MELLON

  公开号：WO2017053564A1

  公开（公告）日：2017-03-30

  An especially robust compound and its derivative metal complexes that are approximately one hundred-fold superior in catalytic performance to the previously invented TAML analogs is provided having the formula (I) wherein Y1, Y2, Y3 and Y4 are oxidation resistant groups which are the same or different and which form 5- or 6-membered rings with a metal, M, when bound to D; at least one Y incorporates a group that is significantly more stable towards nucleophilic attack than the organic amides of TAML activators; D is a metal complexing donor atom, preferably N; each X is a position for addition of a labile Lewis acidic substituent such as (i) H, deuterium, (ii) Li, Na, K, alkali metals, (iii) alkaline earth metals, transition metals, rare earth metals, which may be bound to one or more than one D, (iv) or is unoccupied with the resulting negative charge being balanced by a nonbonded counteraction; at least one Y may contain a site that is labile to acid dissociation, providing a mechanism for shortening complex lifetime. The new complexes deliver catalytic performances that promise to revolutionize multiple oxidation technology spaces including water purification.

  提供了一种特别强大的化合物及其衍生金属配合物，其催化性能大约比先前发明的TAML类似物优越一百倍，其化学式为（I），其中Y1、Y2、Y3和Y4是抗氧化的基团，可以相同也可以不同，并且与金属M结合时形成5-或6-成员环；至少一个Y包含一个对亲核攻击更稳定的基团，比TAML活化剂的有机酰胺更稳定；D是金属络合给体原子，优选为N；每个X是用于添加易失去的Lewis酸性取代基的位置，例如（i）H、氘，（ii）Li、Na、K、碱金属，（iii）碱土金属、过渡金属、稀土金属，可以与一个或多个D结合，（iv）或者未被占据，由非键合的对应作用平衡产生的负电荷；至少一个Y可能包含一个易于酸解离的位点，提供缩短配合物寿命的机制。这些新配合物提供了催化性能，有望彻底改变多种氧化技术领域，包括水净化。
• METHOD FOR PREPARING QUATERNARY PHOSPHONIUM SALTS
  申请人：Microvast Power Systems Co.,Ltd.

  公开号：US20150166587A1

  公开（公告）日：2015-06-18

  A two-step pathway for preparing high pure quaternary phosphonium salts is disclosed. In the first step, hydrogen phosphide (PH 3 ) or a higher phophine reacts with a protonic compound to produce a phosphonium salt, which then reacts with a carbonic acid diester to produce a quaternary phosphonium salt in the second step. On one hand, hydrogen phosphide (PH 3 ) and higher phophines, including primary phosphines, secondary phosphines, and tertiary phosphines, after neutralization with protonic compound, become sufficiently reactive and can be alkylated by carbonic acid diester to form quaternary phosphonium cations. On the other hand, as an anion-exchange procedure is completely avoided, the process not only gives quaternary phosphonium salts of high purity, but also gives people freedom to design the cation and the anion of a quaternary phosphonium salt synchronously by choosing a preferred phosphine and a protonic compound that can supply a desired anion.

  揭示了一种制备高纯度四元磷铵盐的两步途径。在第一步中，氢磷化物（PH3）或更高的磷化物与质子化合物发生反应，产生磷铵盐，然后在第二步中与碳酸二酯发生反应，产生四元磷铵盐。一方面，氢磷化物（PH3）和更高的磷化物，包括一次磷化物、二次磷化物和三次磷化物，在与质子化合物中和后变得足够活性，可以被碳酸二酯烷基化形成四元磷铵阳离子。另一方面，由于完全避免了阴离子交换程序，该过程不仅提供高纯度的四元磷铵盐，还使人们可以通过选择理想的磷化物和可以提供所需阴离子的质子化合物，同时设计四元磷铵盐的阳离子和阴离子。
• Herbicidal isoxazolidine-3,5-diones
  申请人：FMC Corporation

  公开号：US04302238A1

  公开（公告）日：1981-11-24

  2-Substituted isoxazolidine-3,5-diones and isoxazolidine-3-one-5-thiones exhibit herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The preparation and herbicidal activity of the compounds is exemplified.

  2-取代的异噁唑烷-3,5-二酮和异噁唑烷-3-酮-5-硫酮表现出除草活性，有效控制多种草本和阔叶植物的生长。这些化合物的制备和除草活性已经得到示范。
• Process for producing quaternary salts
  申请人：MITSUBISHI PETROCHEMICAL CO., LTD.

  公开号：EP0291074A2

  公开（公告）日：1988-11-17

  A process for producing quaternary salts of high purity is disclosed, comprising reacting a tertiary amine or phosphine with a carbonic acid diester to form a correspond­ing quaternary carbonate and further mixing it with an acid to perform decarboxylation. The quaternary salts thus ob­tained are useful compounds which can be used in wide fields as various catalysts, electrolytes, additives, medicaments, etc.

  本发明公开了一种生产高纯度季盐的工艺，包括将叔胺或膦与碳酸二酯反应生成相应的季碳酸盐，并进一步与酸混合进行脱羧反应。由此获得的季盐是有用的化合物，可广泛用作各种催化剂、电解质、添加剂、药物等。
• DEODORANTS
  申请人：Kao Corporation

  公开号：EP1197204A1

  公开（公告）日：2002-04-17

  The present invention provides a liquid deodorant suitable for deodorization of spaces and fiber products, and a hair cosmetic and skin cosmetic having a high deodorization effect. Here, any of the hair cosmetic and skin cosmetic may be that referred to as a body deodorant. Namely, the present invention provides a deodorant comprising a deodorant organic dibasic acid composed of an organic dibasic acid and/or salt thereof having a difference between the first acid dissociation index (hereinafter, abbreviated as first acid dissociation index) and the second acid dissociation index (hereinafter, abbreviated as second acid dissociation index or pK2) of 1.7 or more at 25°C.

  本发明提供了一种适用于空间和纤维制品除臭的液体除臭剂，以及一种具有高除臭效果的头发化妆品和皮肤化妆品。在此，头发化妆品和皮肤化妆品中的任何一种都可以被称为身体除臭剂。也就是说，本发明提供了一种除臭剂，该除臭剂包含由有机二元酸和/或其盐组成的除臭有机二元酸，在 25°C 时，其第一酸解离指数（以下简称第一酸解离指数）与第二酸解离指数（以下简称第二酸解离指数或 pK2）之差为 1.7 或以上。