Boc-L-alanyl-L-valine methyl ester | 95083-31-1

• 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-L-alanyl-L-valine methyl ester
• 英文别名: methyl (tert-butoxycarbonyl)-L-alanyl-L-valinate；Boc-L-Ala-L-Val-OMe；Boc-Ala-Val-OMe；tert.-Butyloxycarbonyl-Ala-Val-methylester；methyl (2S)-3-methyl-2-[[(2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]amino]butanoate
• CAS: 95083-31-1；19794-07-1
• 化学式: C₁₄H₂₆N₂O₅
• 分子量: 302.371
• InChiKey: VCGUYWCNMHADDI-UWVGGRQHSA-N

物化性质

• 沸点：
  434.6±25.0 °C(Predicted)
• 密度：
  1.070±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  21
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.79
• 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-L-alanyl-L-valine methyl ester 在 苯甲醚 、 三氟乙酸 作用下， 反应 0.67h， 生成 丙氨酰-纈氨酸甲酯
  参考文献：
  名称：

  Syntheses and effects of human splenin(hSP) fragment 32-48 and an analog on the reduced B-lymphocytes of uremic patients.

  摘要：

  我们合成了与人脾蛋白（hSP）第 32 至 48 位氨基酸相对应的 H-Arg-Lys-Ala-Val-Tyr-Val-Glu-Leu-Tyr-Leu-Gln-Ser-Leu-Thr-Ala-Glu-His-OH 十七肽，以及将第 34 位氨基酸残基从 Ala 改为 Glu 的类似物。这些肽是用传统的溶液合成法合成的，并测试了它们对尿毒症患者减少的 B 淋巴细胞的影响。用这两种合成的十七肽（hSP 片段 32-48 和 [Glu34]hSP 片段 32-48）孵育从尿毒症患者体内分离出来的外周淋巴细胞，可增强对衰退的 B 淋巴细胞的作用，但在相同条件下，合成的牛胸腺生成素 II（bTP-II）片段 32-49 没有作用。

  DOI：

  10.1248/cpb.37.2472
• 作为产物：
  描述：

  (2S)-2-({[(2-甲基-2-丙基)氧基]羰基}氨基)硫代丙S-酸 在 碘 作用下， 以 四氢呋喃 、 水 、 乙酸乙酯 为溶剂， 反应 12.01h， 生成 Boc-L-alanyl-L-valine methyl ester
  参考文献：
  名称：

  Thioacetic Acid/NaSH-Mediated Synthesis of N-Protected Amino Thioacids and Their Utility in Peptide Synthesis

  摘要：

  Thioacids are recently gaining momentum due to their versatile reactivity. The reactivity of thioacids has been widely explored in the selective amide/peptide bond formation. Thioacids are generally synthesized from the reaction between activated carboxylic acids such as acid chlorides, active esters, etc., and Na2S, H2S, or NaSH. We sought to investigate whether the versatile reactivity of the thioacids can be tuned for the conversion of carboxylic acids into corresponding thioacids in the presence of NaSH. Herein, we report that thioacetic acid- and NaSH-mediated synthesis of N-protected amino thioacids from the corresponding N-protected amino acids, oxidative dimerization of thioacids, crystal conformations of thioacid oxidative dimers, and the utility of thioacids and oxidative dimers in peptide synthesis. Our results suggest that peptides can be synthesized without using standard coupling agents.

  DOI：

  10.1021/jo402872p

文献信息

• A facile synthesis and crystallographic analysis of N-protected β-amino alcohols and short peptaibols
  作者：Sandip V. Jadhav、Anupam Bandyopadhyay、Sushil N. Benke、Sachitanand M. Mali、Hosahudya N. Gopi

  DOI：10.1039/c0ob01226b

  日期：——

  for the synthesis of N-protected β-amino alcohols and peptaibols using N-hydroxysuccinimide active esters is described. Using this method, dipeptide, tripeptide and pentapeptide alcohols were isolated in high yields. The conformations in crystals of β-amino alcohol, dipeptide and tripeptide alcohols were analysed, with a well-defined type III β-turn being observed in the tripeptide alcohol crystals

  一种简便，高效且无外消旋的方法，使用该方法合成N保护的β-氨基醇和肽醇N-羟基琥珀酰亚胺描述了活性酯。使用这种方法，可以高产率分离出二肽，三肽和五肽醇。分析了β-氨基醇，二肽和三肽醇的晶体构象，在三肽醇晶体中观察到了明确定义的III型β角。发现该方法与Fmoc-，Boc-和其他侧链保护基相容。
• Radical‐Mediated Acyl Thiol‐Ene Reaction for Rapid Synthesis of Biomolecular Thioester Derivatives
  作者：Joshua T. McLean、Pierre Milbeo、Dylan M. Lynch、Lauren McSweeney、Eoin M. Scanlan

  DOI：10.1002/ejoc.202100615

  日期：2021.8.6

  Radical-mediated acyl thiol-ene reactions between biologically relevant alkene and thioacid components enables rapid, chemoselective and high yielding thioester formation. This reaction in combination with substrates that enable intramolecular acyl transfer permits access to native and modified products beyond the thioether linkage.

  生物相关烯烃和硫代酸组分之间自由基介导的酰基硫醇-烯反应能够快速、化学选择性和高产率地形成硫酯。该反应与能够进行分子内酰基转移的底物结合，允许获得超出硫醚键的天然和修饰产物。
• A New and Effective Synthetic Method for the Preparation of the Esters, Peptides, and Lactones Using 3-(5-Nitro-2-oxo-1,2-dihydro-1-pyridyl)-1,2-benzisothiazole 1,1-Dioxide. Synthesis of (±)-(<i>E</i>)-8-Dodecen-11-olide, Recifeiolide
  作者：Alauddin Ahmed、Nagahiro Taniguchi、Hirohiko Fukuda、Hideki Kinoshita、Katsuhiko Inomata、Hiroshi Kotake

  DOI：10.1246/bcsj.57.781

  日期：1984.3

  condensing reagent. A variety of esters, dipeptides, and lactones were obtained in excellent yields. Furthermore, BID-NPy was successfully employed for the lactonization step in a new synthesis of a naturally occurring (±)-(E)-8-dodecen-11-olide, recifeiolide.

  3-(5-Nitro-2-oxo-1,2-dihydro-1-pyridyl)-1,2-benziisothiazole 1,1-dioxide(BID-NPy)，很容易从 3-chloro-1,2-benzisothiazole 制备1,1-二氧化物和5-硝基-2-吡啶酮被证明是一种非常有用的缩合剂。以极好的收率获得了多种酯、二肽和内酯。此外，在天然存在的 (±)-(E)-8-dodecen-11-olide、recifeiolide 的新合成中，BID-NPy 成功地用于内酯化步骤。
• 3-(5-NITRO-2-PYRIDON-1-YL)-1,2-BENZOISOTHIAZOLE 1,1-DIOXIDE (BID-NPy) AS A NEW EFFECTIVE CONDENSING REAGENT
  作者：Alauddin Ahmed、Hirohiko Fukuda、Katsuhiko Inomata、Hiroshi Kotake

  DOI：10.1246/cl.1980.1161

  日期：1980.9.5

  3-(5-Nitro-2-pyridon-1-yl)-1,2-benzoisothiazole 1,1-dioxide (BID-NPy) was found to be a useful condensing reagent. Various dipeptides and esters were prepared in good yields using this reagent.

  3-(5-硝基-2-吡啶酮-1-基)-1,2-苯并异噻唑 1,1-二氧化物（BID-NPy）被发现是一种有用的缩合剂。使用这种试剂，可以以良好的产率制备各种二肽和酯。
• Antimicrobial toxicity studies of ionic liquids leading to a ‘hit’ MRSA selective antibacterial imidazolium salt
  作者：Deborah Coleman、Marcel Špulák、M. Teresa Garcia、Nicholas Gathergood

  DOI：10.1039/c2gc16090k

  日期：——

  Imidazolium salts can be classed as surfactants, detergents, ionic liquids, reagents, catalysts or solvents. A study of the toxicity and ecotoxicity of these salts yields valuable information for their use as pharmaceuticals as well as impact on the environment. Our approach to screen a series of chiral imidazolium salts for toxicity to bacteria and fungi, including clinical pathogen strains, has led to the identification of a ‘hit’ MRSA selective antimicrobial compound. Preliminary structure–activity-relationship (SAR) information (required position of L-phenylalanine and L-valine group) is also elucidated within this first generation of compounds. Conversely, most of the imidazolium salts were nontoxic (IC95 > 2 mM) to the 12 fungi strains and 8 bacteria strains screened, and we propose that they are suitable candidates for ‘green chemistry’ applications. Ecotoxicity studies (Biodegradation ISO 14593 ‘CO2 Headspace Test’) of two bromide ionic liquids containing L-phenylalanine residues indicate that these ionic liquids passed the test (>60% in 28 days) and classed as readily biodegradable.

  咪唑盐可分类为表面活性剂、洗涤剂、离子液体、试剂、催化剂或溶剂。对这些盐的毒性和生态毒性的研究，为其作为药物的使用以及对环境的影响提供了宝贵的信息。我们对一系列手性咪唑盐对细菌和真菌的毒性进行了筛选，包括临床病原菌株，从而鉴定出一种针对MRSA的选择性抗菌化合物。初步的结构-活性关系（SAR）信息（L-苯丙氨酸和L-缬氨酸集团所需的定位）也在这一代化合物中得以阐明。相反，大多数咪唑盐对筛选的12种真菌株和8种细菌株无毒（IC95 > 2 mM），我们提出它们是适合“绿色化学”应用的候选物质。生态毒性研究（ISO 14593生物降解“CO2顶空测试”）表明，含有L-苯丙氨酸残基的两种溴离子液体通过了测试（28天内>60%），被归类为易于生物降解。