L-valyl-N-methyl-L-leucyl-L-alanine benzyl ester | 81135-27-5

• 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: L-valyl-N-methyl-L-leucyl-L-alanine benzyl ester
• 英文别名: benzyl (2S)-2-[[(2S)-2-[[(2S)-2-amino-3-methylbutanoyl]-methylamino]-4-methylpentanoyl]amino]propanoate
• CAS: 81135-27-5
• 化学式: C₂₂H₃₅N₃O₄
• 分子量: 405.538
• InChiKey: YDPIXPLWSTZNDW-WDSOQIARSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.09
• 重原子数：
  29.0
• 可旋转键数：
  10.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.59
• 拓扑面积：
  101.73
• 氢给体数：
  2.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  L-valyl-N-methyl-L-leucyl-L-alanine benzyl ester 在 双(2-氧代-3-恶唑烷基)次磷酰氯 、 二乙胺 、 N,N-二异丙基乙胺 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 3.0h， 生成 H-MeLeu-Val-MeLeu-Ala-OBzl
  参考文献：
  名称：

  Synthesis of D-lysine8-cyclosporine A. Further characterization of BOP-Cl in the 2-7 hexapeptide fragment synthesis

  摘要：

  DOI：

  10.1021/jo00296a061
• 作为产物：
  描述：

  N-methyl-L-leucyl-L-alanine benzyl ester 在 2-bromo-1-ethylpyridin-1-ium tetrafluoroborate 、 二乙胺 、 N,N-二异丙基乙胺 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 0.67h， 生成 L-valyl-N-methyl-L-leucyl-L-alanine benzyl ester
  参考文献：
  名称：

  Total Synthesis of Cyclosporin O Both in Solution and in the Solid Phase Using Novel Thiazolium-, Immonium-, and Pyridinium-Type Coupling Reagents:  BEMT, BDMP, and BEP¹

  摘要：

  Cyclosporin O (1), an extensively N-methylated immunosuppressive cyclic undecapeptide isolated from Tolypocladium inflatum Gams, was synthesized in 20-23% overall yield via 4 + 7 segment condensation and cyclization by the combined utilization of novel thiazolium- and immonium-type peptide coupling reagents 2-bromo-3-ethyl-4-methyl thiazolium tetrafluoroborate (BEMT) and 5-(1H-benzotriazol-1-yloxy)-3,4-dihydro-1-methyl 2H-pyrrolium hexachloroantimonate (BDMP) as well as compound 2-bromo-1-ethyl pyridinium tetrafluoroborate (BEP). BEMT and BEP, which have been proven to be very efficient for the coupling of peptide segments containing N-alkylated amino acid residues with respect to the fast reaction speed, low racemization, and high yields, were used to construct hindered amide bonds in CsO with the addition of HOAt, whereas the most efficient HOBt-derived immonium type reagent, BDMP, was used to perform the coupling of coded amino acids in CsO. Thus, the highly hindered protected 8-11 tetrapeptide 25 was successfully synthesized using BEMT in 65% yield, and the 1-7 heptapeptide 21 was obtained in 52-55% yield by the rationally combined utilization of BDMP, BEMT, and BEP. The synthesis of the linear undecapeptide 27 of CsO in the solid phase using BEMT and BEP was accomplished for the further evaluation of the effectiveness of these reagents.

  DOI：

  10.1021/jo991687c

文献信息

• Total Synthesis of Cyclosporin O by Convergent Approach Employing Fmoc-Amino Acid Chlorides Mediated by Zinc Dust
  作者：Subramanyam J Tantry、Rao Venkataramanarao、Gundala Chennakrishnareddy、Vommina Venkata Sureshbabu

  DOI：10.1021/jo701329w

  日期：2007.11.1

  An epimerization free and efficient total synthesis of immunosuppressant cyclosporin O (CsO) by step-by-step assembly of amino acids in solution phase is reported. The couplings were performed by employing Fmoc-amino acid chlorides and were mediated by zinc dust under neutral conditions. The yield and purity of the coupling of sterically hindered N-methylamino acids to N-methylamino acids at positions

  据报道，通过在溶液相中逐步组装氨基酸，可实现无差向异构和高效的免疫抑制剂环孢菌素O（CsO）的全合成。通过使用Fmoc-氨基酸氯化物进行偶联，并在中性条件下由锌粉介导。的空间耦合的产率和纯度受阻Ñ甲基氨基酸以Ñ甲基氨基酸在位置8，9，10，和11通过在这些特定接合点重复三次耦合增强。分离出与CsO和最终CsO有关的所有10种中间肽，并通过IR，1 H NMR，质谱和HPLC技术对其进行了完全表征。
• Total Synthesis of Cyclosporine: Access to N-Methylated Peptides via Isonitrile Coupling Reactions
  作者：Xiangyang Wu、Jennifer L. Stockdill、Ping Wang、Samuel J. Danishefsky

  DOI：10.1021/ja100517v

  日期：2010.3.31

  tertiary amide bond formations have been applied to a novel total synthesis of the important cyclic polypeptide cyclosporine A. Specifically, the disclosed synthetic route demonstrates the utility of microwave-mediated carboxylic acid isonitrile couplings, thioacid isonitrile couplings at ambient temperature, and isonitrile-mediated couplings of carboxylic acids and thioacids with amines to form challenging

  使用异腈提供仲和叔酰胺键形成的最新进展已应用于重要环状多肽环孢菌素 A 的新型全合成。 具体而言，所公开的合成路线证明了微波介导的羧酸异腈偶联、硫代酸的效用环境温度下的异腈偶联，以及异腈介导的羧酸和硫代酸与胺的偶联以形成具有挑战性的酰胺键。
• Synthesis of cyclosporine. Total syntheses of ?cyclosporin A? and ?cyclosporin H?, two fungal metabolites isolated from the speciesTolypocladium inflatum GAMS
  作者：Roland M. Wenger

  DOI：10.1002/hlca.19840670220

  日期：1984.3.14

  al-MeLeu-Ala-OBzl (20) was synthesized for coupling with the previously described cyclosporine tetrapeptide sequence Boc-D-Ala-MeLeu-MeVal-OH (21). The product of the coupling, the undecapeptide Boc-D-Ala-MeLeu-MeLeu-MeVal-MeBmt-abu-Sar-MeLeu-Val-MeLeu-Ala-OBzl (22), was then deprotected and cyclized to cyclosporine (1).

  合成七肽H-MeBmt-Abu-Sar-MeLeu-Val-MeLeu-Ala-OBzl（20）以与先前描述的环孢素四肽序列Boc-D-Ala-MeLeu-MeVal-OH（21）偶联。然后将偶联的产物十一肽Boc-D-Ala-MeLeu-MeLeu-MeVal-MeBmt-abu-Sar-MeLeu-Val-MeLeu-Ala-OBzl（22）脱保护并环化为环孢霉素（1）。
• Synthesis, conformation and immunosuppressive activity of a conformationally restricted cyclosporin lactam analog
  作者：Johannes D. Aebi、Dominique Guillaume、Brian E. Dunlap、Daniel H. Rich

  DOI：10.1021/jm00117a022

  日期：1988.9

  Cyclosporine A (CsA, 1), an immunosuppressive cyclic undecapeptide, in apolar solvents adopts a II' beta-turn at the Sar3-MeLeu4 residues. [D-Proline3]Cs has been reported to be a nonimmunosuppressive analogue in which the II' beta-turn is retained. In order to determine if this loss of activity is caused by steric hindrance between the Cs analogue and its receptor or is caused by a change in the peptide conformation, an analogue that stabilizes a II' beta-turn has been synthesized, [lactam3,4]Cs. We also have studied the solution conformation of two other analogues, [D-MeAla3]Cs and [L-MeAla3]Cs. The conformations have been established by 1D difference NOE and 2D (NOESY or ROESY) NMR. The conformations of [lactam3,4]Cs and [D-MeAla3]Cs are indistinguishable from that of CsA in solution. [L-MeAla3]Cs was found to adopt a conformation with a cis amide bond between Sar3 and MeLeu4. The inhibition of concanavalin A stimulated thymocytes by CsA, [D-MeAla3]Cs, [L-MeAla3]Cs, and [lactam3,4]Cs gave IC50 values (nM) of 5, 6, 100, and 100, respectively. The weak immunosuppressive activity of [lactam3,4]Cs possessing the II' beta-turn suggests that the loss of activity for 4 is due to steric hindrance with the Cs receptor.
• COLUCCI, WILLIAM J.;TUNG, ROGER D.;PETRI, JOHN A.;RICH, DANIEL H., J. ORG. CHEM., 55,(1990) N, C. 2895-2903
  作者：COLUCCI, WILLIAM J.、TUNG, ROGER D.、PETRI, JOHN A.、RICH, DANIEL H.

  DOI：——

  日期：——