Fmoc-D-Ala-MeLeu-MeLeu-MeVal-OH | 115141-96-3

• 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: Fmoc-D-Ala-MeLeu-MeLeu-MeVal-OH
• 英文别名: Fmoc-D-Ala-N(Me)Leu-N(Me)Leu-N(Me)Val-OH；(2S)-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)propanoyl]-methylamino]-4-methylpentanoyl]-methylamino]-4-methylpentanoyl]-methylamino]-3-methylbutanoic acid
• CAS: 115141-96-3
• 化学式: C₃₈H₅₄N₄O₇
• 分子量: 678.869
• InChiKey: SOWBSQJXQLDUEX-QXTXQQOKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.4
• 重原子数：
  49
• 可旋转键数：
  16
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.55
• 拓扑面积：
  137
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  ((2S,3R,4S,6E)-3-hydroxy-4-methyl-2-(methylamino)-6-octenoyl)-L-2-aminobutyryl-sarcosyl-N-methyl-L-leucyl-L-valyl-N-methyl-L-leucyl-L-alanine benzyl ester 、 Fmoc-D-Ala-MeLeu-MeLeu-MeVal-OH 以60%的产率得到
  参考文献：
  名称：

  RICH, DANIEL H.;SUN, CHONG-QING;GUILLAUME, DOMINIQUE;DUNLAP, BRIAN;EVANS,+, J. MED. CHEM., 32,(1989) N, C. 1982-1987

  摘要：

  DOI：
• 作为产物：
  描述：

  Fmoc-N-甲基-L-亮氨酸 在 双-乙基己氧苯酚甲氧苯基三嗪 、 二乙胺 、 N,N-二异丙基乙胺 、 三氟乙酸 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 17.34h， 生成 Fmoc-D-Ala-MeLeu-MeLeu-MeVal-OH
  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

• Synthesis, conformation, and immunosuppressive activities of three analogs of cyclosporin A modified in the 1-position
  作者：Johannes D. Aebi、Donald T. Deyo、Chong Qing Sun、Dominique Guillaume、Brian Dunlap、Daniel H. Rich

  DOI：10.1021/jm00165a018

  日期：1990.3

  The syntheses of three new cyclosporin A (CsA) analogues that contain novel MeBmt derivatives in the 1-position are described. The MeBmt analogue that contains an additional methyl group on C4, (2S,3R,6E)-4,4-dimethyl-3-hydroxy-2-(N-methylamino)-6-octenoic acid (MeBm2t), was synthesized in four steps beginning with the reaction of Pmz-Sar-OtBu with (4E)-2,2-dimethyl-4-hexenal. The C4 desmethyl analogue

  描述了三个新的环孢菌素A（CsA）类似物的合成，这些类似物在1位上包含新颖的MeBmt衍生物。在四个分子中合成了在C4上包含一个额外甲基的MeBmt类似物（2S，3R，6E）-4,4-二甲基-3-羟基-2-（N-甲基氨基）-6-辛烯酸（MeBm2t）步骤开始于Pmz-Sar-OtBu与（4E）-2,2-二甲基-4-己烯醛的反应。MeBmt的C4脱甲基类似物（2S，3R，6E）-3-羟基-2-（N-甲基氨基）-6-辛烯酸（MeBth）通过Sharpless手性环氧化程序通过九步合成。MeBmt的炔基衍生物（2S，3R，4R）-4-甲基-3-羟基-2-（N-甲基氨基）-6-辛酸（MeByt）是通过修改Tung等人的方法合成的等 用于合成MeBmt。每个MeBmt类似物都被保护为N，O-丙酮化物并与六肽Abu-Sar-MeLeu-Val-MeLeu-Ala-OBzl偶联。将所得的七肽脱保护并与F
• Synthesis, conformation, and immunosuppressive activity of cyclosporines that contain .epsilon.-oxygen (4R)-4-[(E)-butenyl]-4,N-dimethyl-L-threonine analogs in the 1-position
  作者：Chong Qing Sun、Dominique Guillaume、Brian Dunlap、Daniel H. Rich

  DOI：10.1021/jm00167a026

  日期：1990.5

  epoxidation of cis-allylic alcohol derivative 12 with a peracid, followed by the application of a base-catalyzed intramolecular rearrangement of epoxyurethane 15, which was derived from the reaction of epoxy alcohol 14 and methyl isocyanate. All epsilon-oxygen MeBmt analogues have the same stereochemistry and the same functional groups as those on the alpha,beta,gamma-carbons of MeBmt except for the

  合成了一系列在1位含有（4R）-4-[（E）-丁烯基] -4，N-二甲基-L-苏氨酸（MeBmt）的新型ε-氧等位基因的CsA类似物。对映体纯的ε-氧MeBmt类似物4-7的合成关键步骤是基于顺式烯丙基醇衍生物12与过酸的立体选择性环氧化，然后应用碱催化的环氧乙烷15分子内重排，由环氧醇14和异氰酸甲酯的反应得到。除MeBmt的双键被-OCH2-基团取代外，所有的ε-氧MeBmt类似物均具有与MeBmt的α，β，γ碳相同的立体化学和相同的官能团。CsA类似物的肽部分的合成遵循我们先前报道的策略。通过抑制伴刀豆球蛋白A刺激的胸腺细胞确定的CsA类似物28a-e的免疫抑制活性表明，与MeBmt结构最相似的28b保留了约7-10％的CsA活性，而类似物28a，28c，和28e保留约2-5％的活性。有趣的是，在侧链末端具有较大苄基的28d的活性约为CsA的20-25％。通过1D和2D NMR进行的
• 1-Ethyl 2-Halopyridinium Salts, Highly Efficient Coupling Reagents for Hindered Peptide Synthesis both in Solution and the Solid-Phase
  作者：Peng Li、Jie-Cheng Xu

  DOI：10.1016/s0040-4020(00)00657-8

  日期：2000.10

  proved to be very effective for the synthesis of hindered peptides containing N-methylated or Cα,Cα-dialkylated amino acid residues. HPLC monitoring of model reactions indicated that these pyridinium salts demonstrated higher reactivities, lower racemization than the commonly used halogenated uronium and phosphonium salts. The efficiency of these pyridinium type coupling reagents was further proved by the

  1-乙基-2-卤代吡啶鎓盐，BEP，FEP，BEPH和FEPH，合成并证明是含有受阻的肽的合成是非常有效的Ñ甲基化的或Ç α，Ç α-二烷基化的氨基酸残基。HPLC对模型反应的监测表明，与通常使用的卤化铀盐和phospho盐相比，这些吡啶鎓盐具有更高的反应活性和更低的消旋性。通过合成一系列受阻的寡肽和活性酯，具有良好的收率和方便的后处理，进一步证明了这些吡啶鎓类偶联剂的效率。使用这些吡啶鎓盐还成功合成了环孢菌素A（CsA）的8-11四肽片段和Dolastatin 15的五肽部分。这些吡啶鎓类偶联剂对SPPS的效率还通过CsA的极受阻碍的8-11肽段和CsO的线性十一肽的固相合成证明。1 H NMR，IR和HPLC。提出主要的反应性中间体是N-保护的氨基酸或肽的相应的酰卤和酰氧基吡啶鎓盐。
• Synthesis, biological activity, and conformational analysis of (2S,3R,4S)-MeBmt-cyclosporin, a novel 1-position epimer of cyclosporin A
  作者：Daniel H. Rich、Chong Qing Sun、Dominique Guillaume、Brian Dunlap、David A. Evans、Ann E. Weber

  DOI：10.1021/jm00128a048

  日期：1989.8

  Cyclosporin A (CsA, 1), an immunosuppressive cyclic undecapeptide, contains a unique amino acid, (4R)-4-[(E)-butenyl]-4,N-dimethyl-L-threonine (MeBmt), that appears to be critically involved in the biological activity of CsA. In order to further explore the effect that structural elements in MeBmt have on the conformation and biological activity of CsA, the 4-epimer of MeBmt [(4S)-MeBmt, 2] and the corresponding CsA analogue [(4S)-MeBmt1-CsA, 3] have been synthesized. Biological assay using concanavalin A stimulated thymocytes indicated that (4S)-MeBmt1-CsA (3) has only 2-4% immunosuppressive activity relative to CsA. The NMR analysis by 1D and 2D NMR methods establishes the conformation of 3, of which the 33-membered cyclic peptide ring system in chloroform is very similar to that of CsA. However, the NMR analysis also reveals that the 1-position side chain orientation in (4S)-MeBmt1-CsA (3) is very different from that of CsA. Specifically, the (4S)-MeBmt alpha,beta-torsion angle (chi 1) has been rotated approximately 120 degrees relative to that of CsA, and the orientation of the butenyl side chain relative to the 33-membered peptide backbond is different. The orientation of the (4S)-MeBmt side chain is consistent with the possible conformations calculated for (4S)-MeBmt1-CsA (3) by using molecular mechanics (in vacuo) calculations. The conformational analysis suggests that the loss of biological activity for 3 results from an altered conformation of the 1-position side chain relative to the peptide backbond due to the changed chirality at C4 of MeBmt.
• 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.