D,L-Val-OMe | 4070-48-8

• 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: D,L-Val-OMe
• 英文别名: Methyl 2-amino-3-methylbutanoate
• CAS: 4070-48-8
• 化学式: C₆H₁₃NO₂
• mdl: MFCD00044626
• 分子量: 131.175
• InChiKey: CEMZBWPSKYISTN-UHFFFAOYSA-N

物化性质

• 沸点：
  146℃
• 密度：
  0.968
• 闪点：
  21℃

计算性质

• 辛醇/水分配系数(LogP)：
  0.6
• 重原子数：
  9
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.833
• 拓扑面积：
  52.3
• 氢给体数：
  1
• 氢受体数：
  3

安全信息

• 海关编码：
  2922499990
• 危险性防范说明：
  P261,P272,P280,P302+P352,P333+P313,P321,P363,P501
• 危险性描述：
  H317
• 储存条件：
  | 温度范围：2-8°C |

制备方法与用途

L-缬氨酸甲酯是缬氨酸的一种衍生物。

反应信息

• 作为反应物：
  描述：

  D,L-Val-OMe 在 lithium aluminium tetrahydride 作用下， 生成 DL-2-氨基-3-甲基-1-丁醇
  参考文献：
  名称：

  手性溶质-溶剂系统。N-十二烷酰基-L-缬氨酸酰胺与2-氨基烷-1-醇对映体的N-三氟乙酰基酯与α-，β-和γ-氨基酸之间的选择性相互作用

  摘要：

  以O-酰基-N-三氟乙酰基衍生物形式存在的旋光2-氨基烷-1-醇已通过使用N-十二烷酰基-L-缬氨酸6-十一烷基酰胺（1）作为固定相的glc拆分。庞大的O-酰基基团大大促进了拆分。还报道了二酰胺相上α-，β-和γ-氨基酸的N-三氟乙酰基酯的拆分。在L-异构体之后，2-氨基烷-1-醇和γ-氨基酸的衍生物的出现顺序为D，即与α-氨基酸相反。

  DOI：

  10.1039/p29790001230
• 作为产物：
  描述：

  N-t-Boc-Val-OMe 在 molecular sieve 、 三氟化硼乙醚 作用下， 以 二氯甲烷 为溶剂， 反应 20.0h， 生成 D,L-Val-OMe
  参考文献：
  名称：

  使用三氟化硼醚合物对 N-叔丁氧羰基 (BOC) 脱保护

  摘要：

  摘要 描述了在室温下在二氯甲烷中使用三氟化硼醚合物和分子筛去除叔丁氧基羰基 (BOC) 基团的温和有效的程序。该程序的范围是探索各种胺（包括氨基酸衍生物）的脱保护。

  DOI：

  10.1080/00397919708006783
• 作为试剂：
  描述：

  3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride 在 sodium hydroxide 、 N-羟基丁二酰亚胺 、 D,L-Val-OMe 、 N,N'-二环己基碳二亚胺 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 40.5h， 生成 methyl (2S)-2-[[(2S)-2-[[(2S)-2-[[(1S,2R,3S,4R)-3-[[(2S)-1-[[(2S)-1-[[(2S)-1-methoxy-3-methyl-1-oxobutan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]carbamoyl]bicyclo[2.2.1]hept-5-ene-2-carbonyl]amino]-3-methylbutanoyl]amino]-3-methylbutanoyl]amino]-3-methylbutanoate
  参考文献：
  名称：

  Demonstration of endo-cis-(2S,3R)-Bicyclo[2.2.1]hept-5-en-2,3- dicarbonyl Unit as a Reverse-Turn Scaffold and Nucleator of Two-Stranded Parallel β-Sheets:  Design, Synthesis, Crystal Structure, and Self-Assembling Properties of Norborneno Peptide Analogues

  摘要：

  endo-cis-(2S,3R)-Bicyclo[2.2.1]hept-5-en (norbornene) dicarbonyl unit with a built-in U-architecture has been demonstrated to be an excellent reverse-turn molecular scaffold. A large variety of endo-cis-(2S,3R)-norborneno bispeptides containing almost all of the coded amino acids were synthesized and examined for conformational preferences by H-1 NMR, FT-IR, CD, and X-ray crystallographic studies. While FT-IR and H-1 NMR variable-temperature studies ruled out the presence of any significant amount of intramolecular hydrogen bonding in simple bispeptides (3a-h) (except in Aib bispeptide), the CD studies were clearly in favor of a beta-turn type structure. Single-crystal X-ray studies on Aib, Val and Leu containing norborneno bispeptides (3b-d) provided convincing proof for the presence of reverse-turn conformation. While the interstrand C-alpha-C-alpha' distances (5.2-5.7 Angstrom) were well within the range of those for beta-turn structures, no interstrand intramolecular hydrogen bonding was seen in Val and Leu bispeptides; the Aib bispeptide forms a seven-membered hydrogen-bonded ring, thus, showing that the norbornene (2S,3R)-dicarbonyl template assembles peptide chains in reverse-turn conformation by virtue of its built-in U-shaped architecture at these positions, and hydrogen bonding may not be necessary to stabilize the turn structure. The endo-cis-(2S,3R) orientation of bispeptide chains is essential for turn structure as shown by the crystal structure of trans-(2R, 3R) and trans-(2S,3S) derivative of Val bispeptide wherein the two peptide chains move away from each other with the C-alpha-C-alpha' distance increasing to 7.1-8.2 Angstrom. The norbornene 5,6-double bond was hydrogenated to 5,6-dihydro derivative which showed almost the same CD spectrum as its olefinic analogue. Oxidative cleavage [Ru (VIII)] of the 5,6-double bond in norborneno bispeptides, as demonstrated with Leu bispeptide, afforded novel cyclopentanoid peptide analogues. The promise of norbornene unit as a template for nucleating the formation of two-stranded parallel beta-sheets with minimum structural complexity is shown by the preparation of higher members of norborneno bispeptides with the general structure NBE(Pep)(2) [NBE = endo-cis-(2S,3R)-bicyclo[2.2.1]hept-5-en (norbornene) dicarbonyl unit; Pep = peptide strand with two, three, or four (same or different) amino acid residues]. In H-1 NMR, the high (3)J(HN alpha) values (7.0-9.3 Hz) observed for the amide protons (Table 5) coupled with the presence of medium to strong intrastrand sequential ROE connectivities d(alpha N(i,i+1)) spanning the entire three- or four-residue sequence in the peptide strands of 9a-e and 10 and the exhibition of relatively low-temperature coefficients (d delta/dT = -0.2 to -3.4 ppb/K) for amide protons in DMSO-d(6) solvent (Table 4) clearly suggested that hydrogen-bonded beta-sheet conformers dominate the population. FT-IR and CD studies provided further support for parallel beta-sheet structures. A particularly unique feature of the norborneno bispeptides is their strong tendency to self-assemble in the solid state.Thus, while endo-cis-(2S,3R)-Aib bispeptide (3b) forms 16-membered hydrogen bonded centrosymmetric dimers, the half-ester half-acid and the dicarboxylic acid derivatives of 3b self-assemble to form highly ordered hydrogen-bonded molecular ribbons. The Val and Leu cis-(2S, 3R)-bispeptides organize into hydrogen-bonded chains and the trans isomer of Val bispeptide self-assembles into hydrogen-bonded beta-sheet ribbon.

  DOI：

  10.1021/ja980143+

文献信息

• Enantioselection in peptide bond formation
  作者：Roger R. Hill、David Birch、Graham E. Jeffs、Michael North

  DOI：10.1039/b211914e

  日期：2003.3.13

  Selectivity in abiotic condensations of amino acids remains controversial and stereochemically little explored. We find that competitive activated couplings of N-acyl derivatives of glycine, alanine, valine, proline and phenylalanine with binary, ternary and quaternary mixtures of amides and esters of the same group of amino acids show little selectivity among the reactants, except with respect to configuration, where a consistent and significant preference for heterochiral outcomes, mostly >80%, is observed. One possible explanation of this selectivity predicts a predisposition to homochiral coupling under conditions that would require the two carboxyl functions to be co-facial in the activated complex.

  无机物促成的氨基酸缩聚反应中选择性仍然备受争议，而立体化学方面的研究甚少。我们发现，以酰胺和酯组成的双组分、三组分以及四组分混合物为底物，对甘氨酸、丙氨酸、缬氨酸、脯氨酸和苯丙氨酸的N-酰基衍生物进行竞争性活化偶联的反应中，产物在底物分子层面选择性较低，但对映异构选择性较高，选择性系数大多大于80%。此类反应中优先生成异手性产物的一种可能的解释是，在两个羧基必须共面的活化复合物中，同手性偶联具有倾向性。
• Main-Group-Catalyzed Reductive Alkylation of Multiply Substituted Amines with Aldehydes Using H₂
  作者：Yoichi Hoshimoto、Takuya Kinoshita、Sunit Hazra、Masato Ohashi、Sensuke Ogoshi

  DOI：10.1021/jacs.8b03626

  日期：2018.6.13

  the growing demand for green and sustainable chemical processes, the catalytic reductive alkylation of amines with main-group catalysts of low toxicity and molecular hydrogen as the reductant would be an ideal method to functionalize amines. However, such a process remains challenging. Herein, a novel reductive alkylation system using H2 is presented, which proceeds via a tandem reaction that involves

  鉴于对绿色和可持续化学过程的需求不断增长，以低毒主族催化剂和分子氢为还原剂的胺的催化还原烷基化将是一种理想的胺官能化方法。然而，这样的过程仍然具有挑战性。在此，提出了一种使用 H2 的新型还原性烷基化系统，该系统通过串联反应进行，该反应涉及 B(2,6-Cl2C6H3)(p-HC6F4)2 催化形成亚胺，随后通过沮丧的刘易斯对（FLP）。这种还原性烷基化反应产生 H2O 作为唯一的副产物，并直接将带有广泛取代基的胺官能化，这些取代基包括羧基、羟基、附加氨基、伯酰胺和伯磺酰胺基团。异吲哚啉酮和氨基邻苯二甲酸酐的合成也已通过一锅法实现，该法分别由本发明的还原烷基化与分子内酰胺化和分子内脱水反应的组合组成。该反应分别显示出对亚胺中间体和 B(2,6-Cl2C6H3)(p-HC6F4)2 浓度的零级和一级依赖性。此外，H2 浓度显着影响反应进程。这些结果表明了一种可能的机制，其中包含 THF 和 B(2
• HEPATITIS C VIRUS INHIBITORS AND USES THEREOF IN PREPARATION OF DRUGS
  申请人：CHANGZHOU YINSHENG PHARMACEUTICAL CO., LTD.

  公开号：US20170253614A1

  公开（公告）日：2017-09-07

  A series of hepatitis C virus (HCV) inhibitors and compositions and applications thereof in the preparation of drugs for treating chronic HCV infection. Especially, a series of compounds that are used as NS5A inhibitors, and compositions and uses thereof in the preparations of drugs.

  一系列丙型肝炎病毒（HCV）抑制剂及其组合物，以及在制备用于治疗慢性HCV感染的药物时的应用。特别是一系列用作NS5A抑制剂的化合物，以及在药物制剂中的组合物和用途。
• SUBSTITUTED NUCLEOSIDES, NUCLEOTIDES AND ANALOGS THEREOF
  申请人：Alios BioPharma, Inc.

  公开号：US20150105341A1

  公开（公告）日：2015-04-16

  Disclosed herein are nucleosides, nucleotides and nucleotide analogs, methods of synthesizing the same and methods of treating diseases and/or conditions such as a Picornavirus and/or Flaviviridae infection with one or more nucleosides, nucleotides and nucleotide analogs.

  本文披露了核苷、核苷酸和核苷酸类似物，以及它们的合成方法以及利用一个或多个核苷、核苷酸和核苷酸类似物治疗如小核糖核病毒和/或黄病毒科感染等疾病和/或症状的方法。
• Exploring the ability of dihydropyrimidine-5-carboxamide and 5-benzyl-2,4-diaminopyrimidine-based analogues for the selective inhibition of L. major dihydrofolate reductase
  作者：Maria Bibi、Naveeda Akhter Qureshi、Abdul Sadiq、Umar Farooq、Abbas Hassan、Nargis Shaheen、Irfa Asghar、Duaa Umer、Azmat Ullah、Farhan A. Khan、Muhammad Salman、Ahtaram Bibi、Umer Rashid

  DOI：10.1016/j.ejmech.2020.112986

  日期：2021.1

  2,4-diamine, the impact of different amino acids (valine, tryptophan, phenylalanine, and glutamic acid) and two carbon linkers were explored (52-59). The synthesized compounds were assayed against LmDHFR. Compound 59 with the IC50 value of 0.10 μM appeared as potent inhibitors of L. major. Selectivity for parasite DHFR over human DHFR was also determined. Derivatives 55-59 demonstrated excellent selectivity

  为了解决利什曼病，应寻求有效的治疗药物靶标。二氢叶酸还原酶（DHFR）被认为是治疗利什曼病的关键靶标。在当前的研究中，我们感兴趣的是设计和合成针对L. major的针对DHFR的选择性抗叶酸药物。我们专注于基于3,4-二氢嘧啶-2-一和5-（3,5-二甲氧基苄基）嘧啶-2,4-二胺基序的新型抗叶酸药物的开发。对二氢嘧啶（26-30）模板的4-苯环进行了结构活性关系（SAR）研究。对于5-（3,5-二甲氧基苄基）嘧啶-2,4-二胺，研究了不同氨基酸（缬氨酸，色氨酸，苯丙氨酸和谷氨酸）和两个碳连接基的影响（52-59）。针对Lm DHFR测定合成的化合物。化合物59与IC 50 0.10μM的值表现为的强效抑制剂硕大利什曼原虫。还确定了寄生虫DHFR相对于人DHFR的选择性。衍生物55-59对Lm DHFR具有出色的选择性。化合物56（SI = 84.5）和58（SI = 87.5）显示出对Lm