Boc-Val-OBt | 68754-63-2

• 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: Boc-Val-OBt
• 英文别名: benzotriazol-1-yl (2S)-3-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoate
• CAS: 68754-63-2
• 化学式: C₁₆H₂₂N₄O₄
• 分子量: 334.375
• InChiKey: MPEIBROLBMWWLM-ZDUSSCGKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  24
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  95.3
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  Boc-Val-OBt 在 N-甲基吗啉 、 sodium acetate 、 溶剂黄146 、 四乙基碳酸氢铵 、 三苯基膦 作用下， 以 四氢呋喃 、 甲醇 、 水 、 二甲基亚砜 为溶剂， 反应 19.83h， 生成 methyl N-((tert-butoxycarbonyl)-L-valyl)-S-(trifluoromethyl)-L-cysteinate
  参考文献：
  名称：

  未修饰肽与 5-18F-(三氟甲基)二苯并噻吩三氟甲磺酸盐的 18F-三氟甲基化

  摘要：

  5-(三氟甲基)-二苯并噻吩三氟甲磺酸盐的 18F 标记，通常称为 Umemoto 试剂，已通过卤素交换 18F-氟化与 18F-氟化物，然后与 Oxone 和三氟甲磺酸酐氧化环化来完成。这种新的 18F 试剂允许在硫醇半胱氨酸残基处对未修饰的肽进行直接化学选择性 18F 标记。

  DOI：

  10.1021/jacs.7b10227
• 作为产物：
  描述：

  N-Boc-L-缬氨酸 在 O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、 N,N-二异丙基乙胺 作用下， 以 二氯甲烷 为溶剂， 以100%的产率得到Boc-Val-OBt
  参考文献：
  名称：

  Substituted 1,2-ethylenediamines, Methods for Preparing Them and Uses Thereof

  摘要：

  本发明涉及通式（I）的取代1,2-乙二胺化合物，其中基团R1至R15，A，B，L，i以及X1-X4如规范和权利要求中所定义，并且其用于治疗阿尔茨海默病（AD）和类似疾病。

  公开号：

  US20060223759A1

文献信息

• Synthesis of the octadecapeptide corresponding to positions 32 to 49 of the revised amino acid sequence of thymopoietin II and its effect on low E-rosette forming cells of an aged patient with chronic renal failure.
  作者：TAKASHI ABIKO、HIROSHI SEKINO

  DOI：10.1248/cpb.30.3271

  日期：——

  The octadecapeptide, H-Arg-Lys-Asp-Val-Tyr-Val-Glu-Leu-Tyr-Leu-Gln-Ser-Leu-Thr-Ala-Leu-Lys-Arg-OH, corresponding to positions 32 to 49 of the revised amino acid sequence of bovine thymopoietin II was synthesized by the azide condensation of three fragments, (32-36), (37-41) and (42-49), followed by deprotection with hydrogen fluoride in the presence of anisole-thioanisole-o-cresol. The in vitro addition of the synthetic thymopoietin II (32-49) significantly restored the low E-rosette forming capacity of cells from an aged patient with chronic renal failure to normal levels. The in vitro effect of [Gln38, Thr43, Val47]-thymopoietin II (32-49) on the low E-rosette forming capacity of cells from the aged patient with chronic renal failure was also compared with that of the synthetic thymopoietin II (32-49). The [Gln38, Thr43, Val47]-thymopoietin II (32-49) was approximately equipotent with the synthetic thymopoietin II (32-49) at a concentration of 100 μg/ml.

  十八肽H-Arg-Lys-Asp-Val-Tyr-Val-Glu-Leu-Tyr-Leu-Gln-Ser-Leu-Thr-Ala-Leu-Lys-Arg-OH，对应于牛胸腺生成素II修订后的氨基酸序列的第32至49位，通过三个片段(32-36)、(37-41)和(42-49)的叠氮化物缩合合成，随后在茴香硫醚-邻甲酚存在下用氢氟酸脱保护。体外添加合成的胸腺生成素II(32-49)显著恢复了来自慢性肾衰竭老年患者的细胞的低E玫瑰花形成能力至正常水平。[Gln38, Thr43, Val47]胸腺生成素II(32-49)对来自慢性肾衰竭老年患者的细胞的低E玫瑰花形成能力的影响也与合成的胸腺生成素II(32-49)进行了比较。在100 μg/ml的浓度下，[Gln38, Thr43, Val47]胸腺生成素II(32-49)与合成的胸腺生成素II(32-49)大致等效。
• Novel nano-materials, RGD-tetrapeptide-modified 17β-amino-11α-hydroxyandrost-1,4-diene-3-one: synthesis, self-assembly based nano-images and in vivo anti-osteoporosis evaluation
  作者：Yuji Wang、Jianhui Wu、Guifeng Kang、Ming Zhao、Lin Gui、Ning Li、Li Peng、Xiaoyi Zhang、Li Li、Shiqi Peng

  DOI：10.1039/c2jm13983a

  日期：——

  To find novel nano-materials with anti-osteoporosis activity and without side effects three novel anti-osteoporosis active amphiphiles, 17β-(RGD-AA-amido)-11α-hydroxyandrost-1,4-diene-3-one (5a: AA = Ser, 5b: AA = Val, 5c: AA = Phe), were constructed by coupling the bone resorption inhibiting active RGD-peptides and anti-osteoporosis active 17β-amino-11α-hydroxyandrost-1,4-diene-3-one. In the solid state 5a, 5b and 5c exist as dispersed globes of 300 nm–14 μm in diameter, dispersed eggs of 110 nm–19 μm in diameter and beads of 238 nm–22 μm in diameter, respectively. In ultrapure water 1.1 μM of 5a, 5b and 5c form nano-globes of 33–400 nm, 16–278 nm and 54–187 nm in diameter, respectively. At an oral dose of 110 nmol kg−15a–c effectively inhibited mice from developing osteoporosis. In contrast to estradiol, 5a–c did not induce mice to develop endometrial hyperplasia and thrombus.

  为了寻找具有抗骨质疏松活性且无副作用的新型纳米材料，通过结合抑制骨吸收活性的RGD多肽和具有抗骨质疏松活性的17β-氨基-11α-羟基雄甾-1,4-二烯-3-酮，构建了三种新型抗骨质疏松活性的两亲性分子，17β-(RGD-AA-酰胺)-11α-羟基雄甾-1,4-二烯-3-酮（5a：AA = Ser，5b：AA = Val，5c：AA = Phe）。在固态下，5a，5b和5c分别以直径为300 nm至14 μm的分散球体、直径为110 nm至19 μm的分散蛋和直径为238 nm至22 μm的珠子存在。在超纯水中，1.1 μM的5a，5b和5c分别形成直径为33至400 nm、16至278 nm和54至187 nm的纳米球体。在口服剂量为110 nmol kg-1时，5a至5c有效地抑制了小鼠的骨质疏松发展。与雌二醇相比，5a至5c不会导致小鼠子宫内膜增生和血栓形成。
• Microwave Irradiation and Diisopropylcarbodiimide (DIC)/7-Aza-1-hydroxybenzotriazole (HOAt): A Potent Combination for Synthesis of Variuos Hydrazide from N-Protected Amino Acid and Hydrazine
  作者：Albatal, Mona、Ghani, Mohamad Abdul、El-Faham, Ayman、Al-Hazimi, Hassan M.、Hammud, Hassan H.

  DOI：10.5012/jkcs.2010.54.4.419

  日期：2010.8.20

  마이크로웨이브 반응 장치 (Synthos 3000 Aton Paar, GmbH, 1400 W maximum magnetron)를 이용하여, diisopropylcarbodiimide (DIC)/와 1-hydroxybenzotriazoles (HOXt) (X = A or B)를 반응시켜서 amino acid hydrazide를 효율적으로 합성할 수 있는 반응 조건을 개발하였다. 일반적인 가열반응과 마이크로웨이브 반응을 반응 시간, 반응 조건 등을 비교하였을 때에, 마이크로웨이브 반응이 보다 효율적으로 진행되었으며, diisopropylcarbodiimide (DIC)와 1-hydroxybenzotriazole (HOBt) 반응에서보다는 diisopropylcarbodiimide (DIC)와 7-aza-1-hydroxybenzotriazole (HOAt)를 반응시켰을 때에 좋은 수율 (95 - 98%)로 얻어졌다. Here we describe a fast and rapid technique for preparation of amino acid hydrazide as well as peptide hydrazide derivatives using diisopropylcarbodiimide (DIC)/1-hydroxybenzotriazoles (HOXt) (X = A or B) under microwave irradiation employing a multimode reactor (Synthos 3000 Aton Paar, GmbH, 1400 W maximum magnetron). A comparison between conventional and microwave irradiation was described. The microwave methodology is rapid, convenient, proceeds under mild conditions. Diisopropylcarbodiimide (DIC)/7-aza-1-hydroxybenzotriazole (HOAt) always gave much better yield (95 - 98%) and purity than diisopropylcarbodiimide (DIC)/1-hydroxybenzotriazole (HOBt).

  我们采用微波反应装置（Synthos 3000 Aton Paar, GmbH，最大磁控管功率1400 W），开发了在二异丙基氨基亚胺（DIC）与1-羟基苯并三唑（HOXt）（X = A 或 B）反应的条件，能够高效地合成氨基酸肼衍生物。通过比较常规加热反应和微波反应的反应时间、反应条件等，发现微波反应更为高效。在二异丙基氨基亚胺（DIC）与1-羟基苯并三唑（HOBt）的反应中产率不如二异丙基氨基亚胺（DIC）与7-氮杂-1-羟基苯并三唑（HOAt）的反应，后者可以获得更好的产率（95-98%）。 我们在此描述了一种使用二异丙基氨基亚胺（DIC）/1-羟基苯并三唑（HOXt）（X = A 或 B）在微波辐射下制备氨基酸肼及肽肼衍生物的快速技术。比较了传统加热与微波辐射的方法。微波方法快速、方便，并在温和条件下进行。二异丙基氨基亚胺（DIC）/7-氮杂-1-羟基苯并三唑（HOAt）所获得的产率（95-98%）和纯度明显优于二异丙基氨基亚胺（DIC）/1-羟基苯并三唑（HOBt）。
• Curtin–Hammett and Steric Effects in HOBt Acylation Regiochemistry
  作者：Benjamin D. Brink、Justin R. DeFrancisco、Julie A. Hillner、Brian R. Linton

  DOI：10.1021/jo200346r

  日期：2011.7.1

  While hydroxybenzotriazole is commonly used in a variety of bond-forming reactions, its acylation has been shown to produce a regiochemical (O vs N) mixture with complex kinetic behavior. Increased steric bulk on the electrophile favors formation of the oxygen-acylated product. Upon standing as a solid, the mixture can isomerize completely to the nitrogen adduct. An equilibrium ratio of regioisomers

  尽管羟基苯并三唑通常用于各种形成键的反应中，但已表明其酰化作用会产生具有复杂动力学行为的区域化学混合物（O对N）。亲电试剂上增加的空间体积有利于氧酰化产物的形成。静置为固体后，混合物可以完全异构化为氮加合物。通过添加亲核试剂或亲电试剂，可以在溶液中重新建立区域异构体的平衡比，这表明混合物的组成对随后的反应性并不重要。溶剂可以通过科廷-汉米特效应来影响这种区域化学平衡，其中极性溶剂中HOBt的互变异构平衡的偏移会将反应偏向氧加合物。
• Efficient Amounts of Additives for Peptide Coupling Mediated by a Water-Soluble Carbodiimide in Aqueous Media
  作者：Sukekatsu Nozaki

  DOI：10.1246/cl.1997.1

  日期：1997.1

  The optimal amounts of HOBt, HOSu, and HONb for enhancement of peptide coupling mediated by EDC in aqueous media were found to be less then equimolar against the C-component or the carbodiimide. A combination of EDC and 0.1 equimolar amount of HOBt was shown to be an effective coupling reagent under aqueous conditions.

  发现用于增强水性介质中由 EDC 介导的肽偶联的 HOBt、HOSu 和 HONb 的最佳量与 C 组分或碳二亚胺的等摩尔量小于等摩尔。EDC 和 0.1 等摩尔量的 HOBt 的组合在水性条件下被证明是一种有效的偶联剂。