(2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutanethioic S-acid | 187884-05-5

• 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: (2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutanethioic S-acid
• 英文别名: N-tert-butoxycarbonyl-L-valine thioacid；Boc-L-Val-SH；Boc-Val-SH；(S)-2-((tert-butoxycarbonyl)amino)-3-methylbutanethioic S-acid；N^α-Boc-Val-SH；Boc-(D)Val-SH；(2S)-3-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanethioic S-acid
• CAS: 187884-05-5
• 化学式: C₁₀H₁₉NO₃S
• 分子量: 233.332
• InChiKey: GCRSLQLXQJMUGN-ZETCQYMHSA-N

物化性质

• 沸点：
  328.4±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)：
  2.4
• 重原子数：
  15
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  56.4
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutanethioic S-acid 在 碘 、 sodium carbonate 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 12.0h， 生成 N-Boc-L-缬氨酸
  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
• 作为产物：
  描述：

  N-Boc-L-缬氨酸 在 N-甲基吗啉 、 硫化氢 、 氯甲酸异丁酯 作用下， 生成 (2S)-2-[(tert-butoxycarbonyl)amino]-3-methylbutanethioic S-acid
  参考文献：
  名称：

  通过'azirine / oxazolone方法'的变体合成内硫肽BOC-Trp-Ile-Ala-Ala-Aib-Ile-ValΨ[CSNH] Aib-Leu-Aib-Pro-OMe

  摘要：

  描述了十硫代肽BOC-Trp-Ile-Ala-Aib-Ile-Val- [CSNH] Aib-Leu-Aib-Pro-OMe的合成。通过改变“叠氮基/恶唑酮法”而不发生差向异构，将硫代酰胺基引入到大体积的Aib旁边。通过单晶X射线晶体学确定十硫代硫肽的结构，从而可以观察到两种类型的螺旋。

  DOI：

  10.1016/s0040-4020(98)00506-7

文献信息

• Design and synthesis of novel bis(l-amino acid) ester prodrugs of 9-[2-(phosphonomethoxy)ethyl]adenine (PMEA) with improved anti-HBV activity
  作者：Xiaozhong Fu、Saihong Jiang、Chuan Li、Jian Xin、Yushe Yang、Ruyun Ji

  DOI：10.1016/j.bmcl.2006.10.021

  日期：2007.1

  A series of novel bis(L-amino acid) ester prodrugs of 9-[2-(phosphonomethoxy)ethyl] adenine (PMEA) was synthesized and their anti-HBV activity was evaluated in HepG 2 2.2.15 cells. Compounds 11, 12, 21, 22, 26, and 27 demonstrated more potent anti-HBV activity and higher selective index (SI) than adefovir dipivoxil, which was used as a positive control. Compound 11, which was found to be the most potent

  合成了一系列新型的9- [2-（膦酰基甲氧基）乙基]腺嘌呤（PMEA）双（L-氨基酸）酯前药，并在HepG 2 2.2.15细胞中评估了它们的抗HBV活性。与用作阳性对照的阿德福韦酯相比，化合物11、12、21、22、26和27表现出更强的抗HBV活性和更高的选择性指数（SI）。被发现是最有效的化合物11，其效力是阿德福韦酯的5倍，EC50值为0.095 microM，CC50值为6636 microM。化合物11的SI值（> 69,000）分别比阿德福韦酯和拉米夫定高60倍和24倍。体外稳定性研究表明，化合物11比阿德福韦酯更稳定，t1 / 2为270分钟。
• Epimerization-Free Block Synthesis of Peptides from Thioacids and Amines with the Sanger and Mukaiyama Reagents
  作者：David Crich、Indrajeet Sharma

  DOI：10.1002/anie.200805782

  日期：2009.3.16

  reaction of C‐terminal thioacids derived from protected amino acids and peptides with the Sanger reagent and other electron‐deficient aryl halides in the presence of a free amine immediately form a peptide bond with the amine. This essentially epimerization‐free method was used for the 4+4 block synthesis of a hindered octapeptide (see scheme; Boc, Pbf, and Trt are protecting groups).

  在游离胺存在下，由受保护氨基酸和肽衍生的C末端硫代酸与Sanger试剂和其他电子不足的芳基卤化物快速反应而形成的高活化硫酯立即与胺形成肽键。该基本无差向异构的方法用于受阻八肽的4 + 4嵌段合成（请参阅方案； Boc，Pbf和Trt是保护基）。
• Synthesis of the endothiopeptide BOC-Trp-Ile-Ala-Aib-Ile-ValΨ[CSNH]Aib-Leu-Aib-Pro-OMe by a variation of the ‘azirine/oxazolone method’
  作者：Jürg Lehmann、Anthony Linden、Heinz Heimgartner

  DOI：10.1016/s0040-4020(98)00506-7

  日期：1998.7

  The synthesis of the decaendothiopeptide BOC-Trp-Ile-Ala-Aib-Ile-ValΨ[CSNH]Aib-Leu-Aib-Pro-OMe is described. The introduction of the thioamide group next to the bulky Aib occurred via a variation of the ‘azirine/oxazolone method’ without epimerisation. The structure of the decaendothiopeptide was etablished by single-crystal X-ray crystallography, thereby two types of helices could be observed.

  描述了十硫代肽BOC-Trp-Ile-Ala-Aib-Ile-Val- [CSNH] Aib-Leu-Aib-Pro-OMe的合成。通过改变“叠氮基/恶唑酮法”而不发生差向异构，将硫代酰胺基引入到大体积的Aib旁边。通过单晶X射线晶体学确定十硫代硫肽的结构，从而可以观察到两种类型的螺旋。
• A traceless approach to amide and peptide construction from thioacids and dithiocarbamate-terminal amines
  作者：Wenteng Chen、Jiaan Shao、Miao Hu、Wanwan Yu、Marc A. Giulianotti、Richard A. Houghten、Yongping Yu

  DOI：10.1039/c2sc21317f

  日期：——

  with a range of unprotected side chains of amino acid. The ability to produce amide or peptides by a traceless removal of the auxiliary is a significant virtue of the method. Meanwhile, the application of this new peptide-bond-forming reaction to the synthesis of novel endomorphin (EM) derivatives with various binding potencies was realized.

  已经设计出一种新颖且无痕的策略，其允许将硫代酸和二硫代氨基甲酸酯末端的胺偶联。在较早的天然化学连接方法中，已假定该策略取决于半胱氨酸侧链功能等同物的附着。这种方法能够无痕地去除CS 2以直接生成所需的酰胺键，并且与一系列未保护的氨基酸侧链兼容。通过无痕去除助剂产生酰胺或肽的能力是该方法的重要优点。同时，实现了这种新的肽键形成反应在具有各种结合力的新型内啡肽（EM）衍生物的合成中的应用。
• An Efficient Synthesis of Nα-Protected Amino and Peptide Acid Aryl Amides via Iodine-Mediated Oxidative Acylation of Nα-Protected Amino and Peptide Thioacids
  作者：Vommina Sureshbabu、Chilakapati Madhu、T. Vishwanatha

  DOI：10.1055/s-0033-1339488

  日期：——

  Abstract Thioacids derived from N-protected amino or dipeptide and tripeptide acids undergo facile N-acylation with aromatic amines to afford N-protected amino or peptide aryl amides in good to excellent yields and enantiopurities. The method also furnishes difficult-to-prepare N-Fmoc amino acid 4-nitroanilides in good yields. This simple oxidative Nα-acylation of thioacids with aromatic amines proceeds

  摘要 衍生自N-保护的氨基或二肽和三肽的硫代酸容易与芳族胺进行N-酰化，以良好的收率和对映纯度提供N-保护的氨基或肽芳基酰胺。该方法还以高收率提供了难以制备的N -Fmoc氨基酸4-硝基苯胺。这个简单的氧化N- α酰化硫代酸与在碘的存在下，1-羟基苯并三唑和芳族胺前进Ñ，Ñ二异丙基乙胺在四氢呋喃中室温。 衍生自N-保护的氨基或二肽和三肽的硫代酸容易与芳族胺进行N-酰化，以良好的收率和对映纯度提供N-保护的氨基或肽芳基酰胺。该方法还以高收率提供了难以制备的N -Fmoc氨基酸4-硝基苯胺。这个简单的氧化N- α酰化硫代酸与在碘的存在下，1-羟基苯并三唑和芳族胺前进Ñ，Ñ二异丙基乙胺在四氢呋喃中室温。