2-庚基丙二酸二乙酯 | 607-83-0

• 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-庚基丙二酸二乙酯
• 英文名称: diethyl heptylmalonate
• 英文别名: Heptylmalonsaeure-diethylester；Diethyl 2-heptylmalonate；diethyl 2-heptylpropanedioate
• CAS: 607-83-0
• 化学式: C₁₄H₂₆O₄
• mdl: MFCD00027827
• 分子量: 258.358
• InChiKey: HIJIXCXMVYTMCY-UHFFFAOYSA-N

物化性质

• 沸点：
  151 °C
• 密度：
  0.951 g/cm3(Temp: 0 °C)

计算性质

• 辛醇/水分配系数(LogP)：
  4.5
• 重原子数：
  18
• 可旋转键数：
  12
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.857
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 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-庚基丙二酸二乙酯 在 lithium aluminium tetrahydride 作用下， 以 乙醚 为溶剂， 反应 2.0h， 以75%的产率得到2-heptylpropane-1,3-diol
  参考文献：
  名称：

  带有末端乙烯基的同形苯甲酸苯酯和 1,3-二恶烷衍生物

  摘要：

  合成了具有末端乙烯基的 4-烷基苯基 2-氯-4-(4-乙烯基苯甲酰氧基) 苯甲酸酯和 2-苯基-1,3-二恶烷衍生物。获得的大多数新化合物都具有特征性的介晶范围。

  DOI：

  10.1246/bcsj.56.3517
• 作为产物：
  描述：

  heptyl-oxalacetic acid diethyl ester 生成 2-庚基丙二酸二乙酯
  参考文献：
  名称：

  Treatment with diazoxide causes prolonged improvement of β-cell function in rat islets transplanted to a diabetic environment

  摘要：

  Prolonged hyperglycemia desensitizes beta cells. A role for hyperglycemia-induced excessive stimulation can be tested by diazoxide, which inhibits glucose-induced insulin secretion. Using diazoxide, we have investigated in a rat transplantation model whether excessive stimulation can induce lasting effects on beta cells. One batch with 150 islets and another with 20 islets isolated from Wistar-Furth rats were transplanted under the left-kidney capsule of syngeneic streptozotocin-diabetic recipients. In a first series, recipients were treated for 8 weeks with or without 0.2% diazoxide in the food. Graft-bearing kidneys were then perfused and excised. Diazoxide treatment increased by 5.5;fold the insulin response to 10 mmol/L arginine, by 4.1-fold the graft insulin content, and by 2.3-fold the preproinsulin mRNA versus nontreated diabetic controls. The persistence of these effects was assessed in a second series in which 8 weeks of diazoxide treatment was followed by 1 week of no treatment. Again, perfusion experiments showed a higher insulin response to arginine in diazoxide-treated rats (136.0 +/- 25.7 v 62.3 +/- 11.8 fmol/min, P < .05). Also, the response to 27.8 mmol/L glucose was increased (54.0 +/- 17.1 v 13.6 +/- 7.8 fmol/min, P < .05). The insulin content was increased (2.2 +/- 0.6 v 1.0 +/- 0.4 pmol/islet, P < .05), as well as the preproinsulin mRNA (0.60 +/- 0.08 v 0.22 +/- 0.02 pg/islet, P < .05). In a third series, we tested the impact of diazoxide treatment when given only during the first 2 weeks following transplantation. When tested 6 weeks later, insulin secretion was unaffected, whereas there was a strong tendency for a higher preproinsulin mRNA and insulin content in grafts of diazoxide;treated rats. In conclusion, this study demonstrates that beta-cell function in transplanted islets is improved by diazoxide long after the end of treatment, an effect that is likely due to removal of hyperglycemia induced excessive stimulation. Copyright (C) 2000 by W.B. Saunders Company.

  DOI：

  10.1016/s0026-0495(00)80044-x

文献信息

• The synthesis and electro-optic properties of liquid crystalline 2-(2,3-difluorobiphenyl-4′-yl)-1,3-dioxanes
  作者：Chu Chuan Dong、Peter Styring、John W. Goodby、Lawrence K. M. Chan

  DOI：10.1039/a902351h

  日期：——

  Fifty-six novel alkyl and/or alkoxy disubstituted 2-(2,3-difluorobiphenyl-4′-yl)-1,3-dioxanes (DFBPD) were prepared. Smectic C and nematic mesophases were exhibited by most of the alkyl-alkoxy homologues. Conversely, most of the dialkyl compounds exhibited smectic C, smectic A and nematic phases. The birefringence (Δn), dielectric anisotropy (Δε), spontaneous polarisation and response times of two ferroelectric mixtures formulated from the dioxanyl systems were determined. The birefringence results were compared with eight other groups of mixtures where the materials were based on different core systems. The overall electro-optic properties of the DFBPDs were found to be comparable to the best of the eight most commonly used materials in ferroelectric display devices.

  制备了 56 种新型烷基和/或烷氧基二取代的 2-(2,3-二氟联苯-4´-基)-1,3-二氧六环 (DFBPD)。大多数烷基-烷氧基同系物展现出近晶 C 和向列相中間相。相反，多数二烷基化合物展现出近晶 C、近晶 A 和向列相。测定了两个由二氧六环体系构成的铁电混合物的双折射 (Δn)、介电各向异性 (Δε)、自发极化和响应时间。双折射结果与基于不同核心体系的 8 组混合物进行了比较。发现 DFBPD 的整体电光性质与最常用的 8 种铁电显示器材料相当。
• Synthesis and reactions of 4-hydroxy-8,9,10,11- tetrahydropyrido[3,2,1-jk]carbazol-6-ones
  作者：Wolfgang Stadlbauer、Hoai Van Dang、Birgit S. Berger

  DOI：10.1002/jhet.325

  日期：——

  substituent in 11 gave 5‐azido‐ and 5‐amino products 12, 14 or 16. Reactions at the aromatic ring were not observed. Chlorination of 4‐hydroxypyridocarbazoles 6 with phosphoryl chloride by nucleophilic substitution took place exclusively at the 4‐position and gave 4‐chloropyridocarbazolones 17, which were further reacted to azides and amines 18, 19. J. Heterocyclic Chem., (2010).

  四氢咔唑4从苯肼和环己酮得到的，得到由环缩合与2-取代的丙二酸酯5在所有情况下的4-羟基-8,9,10,11-四氢吡啶并[3,2,1- JK ]咔唑-6-酮6通过在攻击四氢咔唑4的氮和芳环; 环化的方向不取决于芳环或饱和环中的取代基。不能分离出异构的吡啶并咔唑。pyridocarbazoles的电子取代6温和的条件下发生在仅仅5位，并给pyridocarbazolediones 9，10，11含5-硝基，5-羟基或5-氯取代基。在氯取代基的交换11，得到5-叠氮基和5-氨基制品12，14或16。没有观察到在芳环上的反应。4- hydroxypyridocarbazoles氯化6与通过亲核取代磷酰氯发生只在4位和得到4- chloropyridocarbazolones 17，将其进一步反应的叠氮化物和胺18，19。J.杂环化​​学。（2010）。
• Synthesis and ring closure reactions of pyrido[3,2,1-<i>jk</i>]carbazol-6-ones
  作者：Hoai V. Dang、Bernd Knobloch、Nargues S. Habib、Thomas Kappe、Wolfgang Stadlbauer

  DOI：10.1002/jhet.5570420112

  日期：2005.1

  4-Hydroxy-5-phenylpyrido[3,2,1-jk]carbazol-6-ones (4, 5), which were obtained from carbazoles 1 and malonates 2 or 3, were converted to reactive intermediates such as 4-chlorides 9 or 4-tosylates 10, which gave in turn 4-azido-5-phenyl derivatives 11. 5-Alkyl-4-azides 11 were not obtained in this manner; however a new one-pot azidation reaction was developed starting from 4-hydroxy derivatives 4 which

  由咔唑1和丙二酸酯2或3获得的4-羟基-5-苯基吡啶并[3,2,1- jk ]咔唑-6-一（4，5）被转化为反应性中间体，例如4-氯化物9或4-tosylates 10，这又得到4-azido-5-phenyl衍生物11。不能以此方式获得5-烷基-4-叠氮化物11。然而，从4-羟基衍生物4开始开发了一种新的一锅叠氮化反应，其以良好的产率得到了叠氮化物11。4-叠氮基-5-苯基衍生物11f在热解后环化为吲哚12。通过热分析方法（DSC）研究了叠氮化物11的热行为。
• Synthesis of protected α-amino acids <i>via</i> decarboxylation amination from malonate derivatives
  作者：Hui Fu、Peihe Li、Zheng Wang、Xiaoying Li、Qipu Dai、Changwen Hu

  DOI：10.1039/d0ob00677g

  日期：——

  A general and efficient strategy for the synthesis of protected α-amino acids is reported. The method uses malonate derivatives as the starting materials and Cs2CO3 as a base at 60 degrees, giving α-amino acid derivatives in moderate yields by releasing CO2. This methodology shows broad substrate scope (primary and secondary acids), excellent functional group tolerance and high efficiency to give the

  报道了一种合成保护的α-氨基酸的通用有效策略。该方法以丙二酸酯衍生物为起始原料，以Cs 2 CO 3为碱在60度下，通过释放CO 2，以中等收率得到α-氨基酸衍生物。该方法学显示了广泛的底物范围（伯酸和仲酸），出色的官能团耐受性和高效率，可在温和的反应条件下提供所需的产物。它还允许构建β和γ-氨基酸以及其他非天然产物。
• Mesogenic, optical, and dielectric properties of 5-substituted 2-[12-(4-pentyloxyphenyl)-p-carboran-1-yl] [1,3]dioxanes
  作者：Takashi Nagamine、Adam Januszko、Piotr Kaszynski、Kiminori Ohta、Yasuyuki Endo

  DOI：10.1039/b608012j

  日期：——

  Two homologous series of carborane-containing dioxanes 1[n] and 2[n] (n = 1–10) were prepared and their mesogenic properties investigated. All compounds exhibit nematic behavior and three members of series 2[n] show an E phase. Numerical analysis of the clearing temperatures gave a limiting value TNI(∞) of 89 °C for series 2[n] and indicated conformational flexibility of the dioxane ring. Investigations of three-ring derivative 1[4] gave Δn = 0.17, S = 0.53, and Δε = +0.4 ± 0.1 at 85 °C. Extrapolation of dielectric data for dilute solutions of 1[4] in 6-CHBT gave Δε = +0.4 ± 0.25 at 24 °C. Modelling of dielectric results with the Maier–Meier equation demonstrated that conformers with a higher β angle are preferred, which is consistent with conformational selection for the most elongated conformers.

  准备了两个含有碳硼烷的二噁烷同系物系列1[n]和2[n]（n = 1–10），并对它们的介晶性质进行了研究。所有化合物均表现出向列行为，而系列2[n]中的三个成员显示出E相。清晰温度的数值分析给出了系列2[n]的极限值TNI(∞)为89°C，并表明二噁烷环的构象灵活性。对三环衍生物1[4]的研究得到了Δn = 0.17，S = 0.53，以及在85°C时Δε = +0.4 ± 0.1。对1[4]在6-CHBT稀溶液中的介电数据进行外推时，在24°C得到了Δε = +0.4 ± 0.25。利用Maier–Meier方程对介电结果的建模表明，具有更高β角的构象更为偏好，这与对于最细长构象的构象选择一致。