cyclo(-L-Val-L-Ala-) | 15136-26-2

• 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: cyclo(-L-Val-L-Ala-)
• 英文别名: cyclo-(Ala-Val)；cyclo(L-Ala-L-Val)；(3S,6S)-3-Isopropyl-6-methylpiperazine-2,5-dione；(3S,6S)-3-methyl-6-propan-2-ylpiperazine-2,5-dione
• CAS: 15136-26-2
• 化学式: C₈H₁₄N₂O₂
• 分子量: 170.211
• InChiKey: ORLDMMKUTCCBSM-WDSKDSINSA-N

物化性质

• 沸点：
  429.7±38.0 °C(Predicted)
• 密度：
  1.040±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.5
• 重原子数：
  12
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  58.2
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  cyclo(-L-Val-L-Ala-) 在 盐酸 、 sodium hydroxide 、 正丁基锂 、 potassium hypochlorite 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 二氯甲烷 为溶剂， 反应 117.58h， 生成 L-缬氨酸
  参考文献：
  名称：

  和（2S） - - （2R） - [1- 13 C] -2-氨基-2-甲基丙二酸：为丝氨酸羟甲基转移手性基板

  摘要：

  （2R） -和（2S） - [1- 13 C] -2-氨基-2-甲基丙，对于丝氨酸羟甲基反应的立体化学过程探针，已经从合成双-lactim醚类从缬氨酸和丙氨酸的。用碳酸二乙酯直接将阴离子酰化，得到N-乙氧羰基衍生物，而不是所需的乙酯。在13因此C标记的羧基基团被引入通过治疗的阴离子的与[1- 13 C] -乙酰氯，接着卤仿氧化。将得到的羧酸盐，然后用甲基碘酯化，和双在酸性条件下裂解-内酰胺醚环系统，得到氨基酸酯。皂化，然后通过阳离子交换色谱分离，得到标题化合物。

  DOI：

  10.1016/s0040-4020(01)90505-8
• 作为产物：
  描述：

  丙氨酰-纈氨酸甲酯 在 三乙胺 作用下， 以 甲醇 为溶剂， 反应 48.0h， 以0.42 mmol的产率得到cyclo(-L-Val-L-Ala-)
  参考文献：
  名称：

  Structures, Sensory Activity, and Dose/Response Functions of 2,5-Diketopiperazines in Roasted Cocoa Nibs (Theobroma cacao)

  摘要：

  The taste compounds inducing the blood-like, metallic bitter taste sensation reported recently for a dichloromethane extract prepared from roasted cocoa nibs were identified as a series of 25 diketopiperazines by means of HPLC degustation, LC-MS/MS, and independent synthesis. Among these 25 compounds, 13 cis-configured diketopiperazines, namely, CYCIO(L-IIe-L-Phe), CYCIO(L-Val-L-Leu), CYCIO(L-Pro-L-Pro), CYCIO(L-IIe-L-Pro), CYCIO(L-Val-L-Tyr), CYCIO(L-Ala-L-Tyr), CYCIO(L-Phe-L-Ser), CYCIO(L-Ala-L-IIe), CYCIO(L-LeU-L-Phe), cyclo(L-Pro-L-Val), CYCIO(L-Pro-L-Thr), CYCIO(L-PrO-L-Tyr), and CYCIO(L-Val-L-Val) were identified for the first time in cocoa. In addition, the taste recognition thresholds for the metallic as well as the bitter taste of the diketopiperazines were determined, and after quantitative analysis by using two diastereomeric diketopiperazines as the internal standards, the sensory impact of the diketopiperazines was evaluated on the basis of their close-over-threshold (DoT) factors calculated as the ratio of the concentration and the threshold concentration of a compound. These data revealed DoT factors above 1.0 exclusively for cis-cyclo(L-Pro-L-Val), cis-cyclo(L-Val-L-Leu), cis-cyclo(L-Ala-L-IIe), cis-cyclo(L-Ala-L-Leu), and cis-cyclo(L-IIe-L-Pro), whereas all of the other diketopiperazines were present below their individual bitter taste threshold concentrations and should therefore not contribute to the cocoa taste. Because the DoT factors do not consider the nonlinear relationship between the concentration and gustatory response of an individual compound, we, for the first time, report on the recording of dose/response functions describing the human bitter taste perception of diketopiperazines more precisely.

  DOI：

  10.1021/jf051313m

文献信息

• Acetic acid-catalyzed diketopiperazine synthesis.
  作者：KENJI SUZUKI、YUSUKE SASAKI、NOBUYOSHI ENDO、YUICHI MIHARA

  DOI：10.1248/cpb.29.233

  日期：——

  Optically pure diketopiperazines were obtained in good yields when dipeptide esters were refluxed in 2-butanol containing 0.1 M acetic acid for 3 hours. When prolyl-amino acid ester was used as the starting material, 1 to 2 M acetic acid was the most effective concentration.

  当二肽酯在含有0.1 M醋酸的2-丁醇中回流3小时时，得到了光学纯的二酮哌嗪，产率良好。当使用脯氨酰氨基酸酯作为起始材料时，1至2 M醋酸是最有效的浓度。
• Application of the Dipeptidyl Peptidase IV (DPPIV/CD26) Based Prodrug Approach to Different Amine-Containing Drugs
  作者：Alberto Diez-Torrubia、Carlos García-Aparicio、Silvia Cabrera、Ingrid De Meester、Jan Balzarini、María-José Camarasa、Sonsoles Velázquez

  DOI：10.1021/jm901590f

  日期：2010.1.28

  human and bovine serum. When the amino group is present on a pyrimidine or purine ring, the dipeptide derivatives are chemically unstable, whereas the tetrapeptide derivatives (i.e., ValProValPro or ValAlaValPro) were much more stable in solution and efficiently converted to the parent drug by the action of DPPIV/CD26. This DPPIV/CD26-directed prodrug technology can be useful to increase solubility of

  在这里，我们探讨基于二肽基肽酶IV（DPPIV / CD26）的前药方法在多种含胺药物中的适用性。已经开发了用于合成二肽和四肽酰胺前药的有效方法，包括胞苷和腺苷核苷的环外氨基官能团的N-酰化方案。我们的研究表明，与存在于芳香环或糖实体上的游离氨基连接的XaaPro二肽是前药，通过纯化的DPPIV / CD26以及可溶性DPPIV / CD26在牛和人血清中的转化，可有效释放母体药物。维达列汀，一种DPPIV / CD26的特异性抑制剂，在纯化的CD26存在下以及在人和牛血清中都能完全阻断前药的水解。当氨基存在于嘧啶或嘌呤环上时，二肽衍生物在化学上是不稳定的，而四肽衍生物（即ValProValPro或ValAlaValPro）在溶液中更稳定，并通过DPPIV /的作用有效地转化为母体药物CD26。这种DPPIV / CD26导向的前药技术可用于增加母体药物分子的溶解度和/或提供更好的制剂性能。
• 1-Isopropylallyloxycarbonyl (IPAoc) as a protective group of amines and its deprotection catalysed by palladium-phosphine complex
  作者：Ichiro Minami、Masami Yuhara、Jiro Tsuji

  DOI：10.1016/s0040-4039(00)96195-1

  日期：——

  As a new protective group of amines, 1-isopropylallyloxycarbonyl (IPAoc) group was developed. IPAoc group can be removed by treatment with a palladium-phosphine catalyst forming carbon dioxide and 4-methyl-1,3-pentadiene by the decarboxylation and β-hydrogen elimination of (π-1-isopropylallyl)-palladium intermediate under neutral conditions. The present protection-deprotection was applied to a one-pot

  作为一种新的胺保护基，开发了1-异丙基烯丙氧羰基（IPAoc）基团。IPAoc基团可通过在中性条件下通过对（π-1-异丙基烯丙基）-钯中间体进行脱羧和β-氢消除而用形成二氧化碳和4-甲基-1,3-戊二烯的钯-膦催化剂处理而除去。本保护-脱保护被应用于一锅法肽合成。
• Preparation of novel 2-(trialkylsilyl)ethyl linkers and first synthesis of Tryprostatin B on solid phase
  作者：Bingbing Wang、Li Chen、Kyungjin Kim

  DOI：10.1016/s0040-4039(00)02312-1

  日期：2001.2

  methods for novel polymer-supported 2-(trialkylsilyl)ethanol linkers 3 are described. The new silyl linker has been examined as a C-terminal linkage to provide several diketopiperazines. Using this synthetic method, the first solid phase synthesis of Tryprostatin B was accomplished. Several functionalized 2-(trialkylsilyl)ethyl linkers 12–17 are synthesized from 2-(trialkylsilyl)ethanol linkers. During

  描述了用于新型聚合物负载的2-（三烷基甲硅烷基）乙醇接头3的两种合成方法。新的甲硅烷基连接基已作为C端连接基进行了研究，以提供几种二酮哌嗪。使用这种合成方法，完成了Tryprostatin B的第一个固相合成。几个官能2-（三烷基甲硅烷）乙基接头12 - 17从2-（三烷基甲硅烷）乙醇接头合成。在制备过程中，新的甲硅烷基连接基证明对各种反应条件具有抵抗力，例如碱性和中度酸性介质，氧化和高温条件。
• Substituted naphthyridinone compounds useful as T cell activators
  申请人：BRISTOL-MYERS SQUIBB COMPANY

  公开号：US10669272B2

  公开（公告）日：2020-06-02

  Disclosed are compounds of Formula (I): or a salt thereof, wherein: R1, R2, R3, R4, R5, and m are defined herein. Also disclosed are methods of using such compounds to inhibit the activity of one or both of diacylglycerol kinase alpha (DGKα) and diacylglycerol kinase zeta (DGKζ), and pharmaceutical compositions comprising such compounds. These compounds are useful in the treatment of viral infections and proliferative disorders, such as cancer.

  公开的是式 (I) 化合物： 或其盐，其中R1、R2、R3、R4、R5 和 m 在本文中定义。还公开了使用此类化合物抑制二酰甘油激酶α（DGKα）和二酰甘油激酶zeta（DGKζ）中的一种或两种的活性的方法，以及包含此类化合物的药物组合物。这些化合物可用于治疗病毒感染和增殖性疾病，如癌症。