Boc-Val-Val-OBzl | 77443-49-3

• 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: Boc-Val-Val-OBzl
• 英文别名: (S)-benzyl 2-((S)-2-((tert-butoxycarbonyl)amino)-3-methylbutanamido)-3-methylbutanoate；n-Boc-valinyl-valine benzyl ester；benzyl (2S)-3-methyl-2-[[(2S)-3-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoyl]amino]butanoate
• CAS: 77443-49-3
• 化学式: C₂₂H₃₄N₂O₅
• 分子量: 406.522
• InChiKey: UMJASUPYSMZDFE-ROUUACIJSA-N

物化性质

• 熔点：
  51-55 °C
• 沸点：
  544.0±35.0 °C(Predicted)
• 密度：
  1.079±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  29
• 可旋转键数：
  11
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.59
• 拓扑面积：
  93.7
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  Boc-Val-Val-OBzl 在 氢氟酸 作用下， 生成 缬氨酰-缬氨酸
  参考文献：
  名称：

  摘要：

  DOI：

  10.1023/a:1016259816661
• 作为产物：
  描述：

  叔-丁基氯甲酸酯 在 magnesium oxide 、 N,N'-二环己基碳二亚胺 作用下， 以 四氢呋喃 、 乙醚 、 水 为溶剂， 生成 Boc-Val-Val-OBzl
  参考文献：
  名称：

  Simplified Pepstatins:  Synthesis and Evaluation of N-Terminally Modified Analogues

  摘要：

  The promising strategy of gastric ulcer healing with perorally administered epidermal growth factor (EGF) is so far strongly limited by the pepsinic degradation of this therapeutic polypeptide in the stomach. The incorporation of EGF in a bioadhesive polymer-pepsin inhibitor conjugate used as drug carrier matrix, however, might provide sufficient protection toward pepsinic degradation. The synthesis of appropriate pepsin inhibitors represents a prerequisite for the development of such polymer-inhibitor conjugates. The presented study demonstrates that modifications at the N-terminus of simplified analogues of pepstatin which can be synthesized in a simple and straight way result only in slight variations of the inhibitory activity. These analogues display only 10-fold reduced-inhibitory activity, compared to pepstatin A, when bearing a greater N-terminal group like isovaleryl, Boc, or Cbz. Compounds which are substituted at the N-terminus by a shorter N-acyl group like propionyl or cyclopropylcarbonyl show further reduced activity (0.01, compared to pepstatin A). The presence of an amide or a urethane moiety at the N-terminus has no considerable effect on enzyme inhibition. Therefore, the N-terminus of these analogues is able to be modified forming a covalent bond to various bioadhesive polymers via a suitable functionality.

  DOI：

  10.1021/jm9807306

文献信息

• Oxygen Alkylation of Schiff Base Derivatives of Amino Acids
  作者：Martin J. O'Donnell、Gwendolyn K. Cook、David B. Rusterholz

  DOI：10.1055/s-1991-26625

  日期：——

  Higher imine esters 1a-h and 7a-b of amino acids and dipeptides are prepared in 68-91% yield by saponification of the benzophenone Schiff base methyl esters 3a-d and 6 using phase-transfer techniques followed by O-alkylation with an alkyl halide. The procedure occurs with retention of configuration at the α-carbon except with phenylglycine derivatives.

  氨基酸和二肽的高亚胺酯1a-h和7a-b通过皂化苯甲酮席夫碱甲酯3a-d和6，采用相转移技术，随后与烷基卤进行O-烷基化，产率在68-91%之间。该过程在α-碳上保留构型，除了苯基甘氨酸衍生物外。
• 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。
• Synthesis and structure-activity relationships of amastatin analogues, inhibitors of aminopeptidase A.
  作者：Hiroyasu TOBE、Hajime MORISHIMA、Takaaki AOYAGI、Hamao UMEZAWA、Kunio ISHIKI、Kenji NAKAMURA、Takeo YOSHIOKA、Yasutaka SHIMAUCHI、Taiji INUI

  DOI：10.1271/bbb1961.46.1865

  日期：——

  Stereoisomers and analogues of amastatin, [(2S, 3R)-3-amino-2-hydroxy-5-methylhexanoyl]-L-Val-L-Val-L-Asp, were synthesized and their inhibitory activities towards aminopeptidase A (AP-A) and other arylamidases tested. Among the four stereoisomers of a new amino acid residue in amastatin, the 2S stereoisomers exhibited strong activity. In a series of compounds in which the C-terminal amino acid of amastatin was substituted by other amino acids, the one containing Asp or Glu showed the strongest activity towards AP-A. In a series of compounds in which the second or third residue from the amino terminal of amastatin was substituted by other amino acids, the one containing hydrophobic amino acids showed strong activity. In the study of the relationship of the length of the peptide chain and inhibitory activity, the activity towards AP-A was seen to increase until the length of the peptide reached that of a tetrapeptide.

  阿马司他（(2S,3R)-3-氨基-2-羟基-5-甲基己酰基-L-缬氨酰-L-缬氨酰-L-天冬氨酸）的立体异构体和类似物被合成，并测试了它们对氨基肽酶A（AP-A）和其他芳基酰胺酶的抑制活性。在阿马司他中一个新的氨基酸残基的四种立体异构体中，2S立体异构体表现出强烈的活性。在一系列将阿马司他C端氨基酸替换为其他氨基酸的化合物中，含有Asp或Glu的化合物对AP-A显示出最强的活性。在一系列将阿马司他从氨基端开始的第二个或第三个残基替换为其他氨基酸的化合物中，含有疏水氨基酸的化合物表现出强烈的活性。在研究肽链长度与抑制活性关系的研究中，随着肽链长度达到四肽水平，对AP-A的活性逐渐增加。
• Design, synthesis, and evaluation of cystargolide-based β-lactones as potent proteasome inhibitors
  作者：Doleshwar Niroula、Liam P. Hallada、Camille Le Chapelain、Susantha K. Ganegamage、Devon Dotson、Snezna Rogelj、Michael Groll、Rodolfo Tello-Aburto

  DOI：10.1016/j.ejmech.2018.08.052

  日期：2018.9

  infiltration assays revealed that minor structural modifications have significant effects on the ability of our PIs to inhibit intracellular proteasomes, and we identified 5k as a promising candidate for continued therapeutic studies. Our novel drug lead 5k is a more potent proteasome inhibitor than carfilzomib with mid-to-low nanomolar IC50 measurements and it is cytotoxic against multiple cancer cell lines

  肽β-内酯蛋白酶体抑制剂（PIs）胱氨酸A和B被用于进行结构活性关系（SAR）研究，以评估其抗癌潜力。总共设计，合成并评估了24种不同的类似物的蛋白酶体抑制作用，对几种癌细胞系的细胞毒性以及它们进入完整细胞的能力。X射线晶体学分析和亚基选择性用于确定与β-内酯（P 1），肽核，（P x和P y）和端帽（P z）的结构修饰相关的特定亚基结合我们的脚手架。cygogolide衍生物5k，在P y和P处结构唯一图1显示出对人蛋白酶体的β5亚基最有希望的抑制活性（IC 50  ＝ 3.1nM），并且对MCF-7（IC 50  ＝ 416nM），MDA-MB-231（IC 50  ＝ 74nM）和对MCF-7具有显着的细胞毒性。RPMI 8226（IC 50  = 41 nM）癌细胞系。细胞浸润试验表明，微小的结构修饰对我们的PI抑制细胞内蛋白酶体的能力有重大影响，我们确定5k是继续治疗研究的有希望
• Development of Supramolecular Organo-Gel Based on Tripeptide Skeletons
  作者：Eriko Azuma、Kouji Kuramochi、Kazunori Tsubaki

  DOI：10.1248/cpb.58.680

  日期：——

  Boc-Ser-Val-Gly-OCH2Ph (31) showed high gelation abilities in the aromatic solvents, particularly in toluene. The minimum gelation concentration of 31 in toluene was 10 mg/ml, suggesting that 2500 molecules of toluene were immobilized by each molecule of the tripeptide 31. The FT-IR data indicated that formation of antiparallel β-sheets through intermolecular hydrogen bonding was central to the generation of nanofibers during gelation.

  Boc-Ser-Val-Gly-OCH2Ph (31) 在芳香族溶剂中显示出强大的成胶能力，尤其是在甲苯中。31在甲苯中的最低成胶浓度为10 mg/ml，这意味着每分子三肽31固定了2500个甲苯分子。傅里叶变换红外光谱数据显示，通过分子间氢键形成反平行β-折叠是成胶过程中产生纳米纤维的关键。