L-phenylalanyl-L-phenylalanine dimethylamide | 96574-62-8

• 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-phenylalanyl-L-phenylalanine dimethylamide
• 英文别名: (2S)-2-amino-N-[(2S)-1-(dimethylamino)-1-oxo-3-phenylpropan-2-yl]-3-phenylpropanamide
• CAS: 96574-62-8
• 化学式: C₂₀H₂₅N₃O₂
• 分子量: 339.437
• InChiKey: JAFIBEQLTNYHDV-ROUUACIJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.4
• 重原子数：
  25
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  75.4
• 氢给体数：
  2
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  Z-Tyr-Pro-OH 、 L-phenylalanyl-L-phenylalanine dimethylamide 在 N-羟基丁二酰亚胺 、 N,N'-二环己基碳二亚胺 作用下， 以 四氢呋喃 为溶剂， 反应 6.5h， 生成 C₄₂H₄₇N₅O₇
  参考文献：
  名称：

  Structure–activity study of endomorphin-2 analogs with C-terminal modifications by NMR spectroscopy and molecular modeling

  摘要：

  Endomorphin-2 (EM-2) is a putative endogenous mu-opioid receptor ligand. To get insight into the important role of C-terminal amide group of EM-2, we investigated herein a series of EM-2 analogs by substitution of the C-terminal amide group with -NHNH2, -NHCH3, -N(CH3)(2), -OCH3, -OCH2CH3, -OC(CH3) 3, and -CH2 -OH. Their binding affinity and bioactivity were determined and compared. Despite similar (analogs 1, 4, and 7) or decreased (analogs 2, 3,5, and 6) mu affinity in binding assays, all analogs showed low guinea pig ileum (GPI) and mouse vas deferens (MVD) potencies compared to their parent peptide. Interestingly, as for analogs 2 and 3 (a single and double N-methylation of C-terminal amide), the potency order with the K-i (mu) values was 2 > 3; for the C-terminal esterified analogs 4 -6, the potency order with the Ki (mu) values was 4 > 5 > 6. Thus, we concluded that the steric hindrance of C-terminus might play an important role in opioid receptor affinity. We further investigated the conformational properties of these analogs by 1D and 2D H-1 NMR spectroscopy and molecular modeling. Evaluating the ratios of cis-and trans-isomers, aromatic interactions, dihedral angles, and stereoscopic views of the most convergent conformers, we found that modi. cations at the C-terminal amide group of EM-2 affected these analog conformations markedly, therefore changed the opioid receptor affinity and in vitro bioactivity. (c) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2008.05.001
• 作为产物：
  描述：

  Boc-Phe-Phe-N(CH3)2 在 盐酸 作用下， 以 乙酸乙酯 为溶剂， 生成 L-phenylalanyl-L-phenylalanine dimethylamide
  参考文献：
  名称：

  Structure–activity study of endomorphin-2 analogs with C-terminal modifications by NMR spectroscopy and molecular modeling

  摘要：

  Endomorphin-2 (EM-2) is a putative endogenous mu-opioid receptor ligand. To get insight into the important role of C-terminal amide group of EM-2, we investigated herein a series of EM-2 analogs by substitution of the C-terminal amide group with -NHNH2, -NHCH3, -N(CH3)(2), -OCH3, -OCH2CH3, -OC(CH3) 3, and -CH2 -OH. Their binding affinity and bioactivity were determined and compared. Despite similar (analogs 1, 4, and 7) or decreased (analogs 2, 3,5, and 6) mu affinity in binding assays, all analogs showed low guinea pig ileum (GPI) and mouse vas deferens (MVD) potencies compared to their parent peptide. Interestingly, as for analogs 2 and 3 (a single and double N-methylation of C-terminal amide), the potency order with the K-i (mu) values was 2 > 3; for the C-terminal esterified analogs 4 -6, the potency order with the Ki (mu) values was 4 > 5 > 6. Thus, we concluded that the steric hindrance of C-terminus might play an important role in opioid receptor affinity. We further investigated the conformational properties of these analogs by 1D and 2D H-1 NMR spectroscopy and molecular modeling. Evaluating the ratios of cis-and trans-isomers, aromatic interactions, dihedral angles, and stereoscopic views of the most convergent conformers, we found that modi. cations at the C-terminal amide group of EM-2 affected these analog conformations markedly, therefore changed the opioid receptor affinity and in vitro bioactivity. (c) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2008.05.001

文献信息

• A New General Approach to Enantiomerically Pure Cyclic and Open-Chain (<i>R</i>)- and (<i>S</i>)-α,α-Disubstituted α-Amino Acids
  作者：Daniel Obrecht、Clive Spiegler、Peter Schönholzer、Klaus Müller、Heinz Heimgartner、Friedrich Stierli

  DOI：10.1002/hlca.19920750522

  日期：1992.8.13

  racemic N-acylated α,α-disubstituted amino acids were resolved by coupling to chiral amines 15-18 derived from (S)-phenylalanine to form diastereoisomers 19/20 or 21/22 that could be separated by crystallization and/or flash chromatography on silica gel (Scheme 3). Selective cleavage via the 1,3-oxazol-5(4H)-ones 10a-p gave the corresponding optically pure α,α-disubstituted amino-acid derivatives 11 or

  制备了各种各样的环状和开链α，α-二取代的α-氨基酸1a-p。通过与衍生自（S）-苯丙氨酸的手性胺15-18偶联，拆分外消旋N-酰化的α，α-二取代氨基酸，形成非对映异构体19/20或21/22，可以通过结晶和/或快速色谱分离在硅胶上（方案3）。通过1,3-恶唑-5（4 H）-酮10a-p的选择性裂解以高收率得到相应的光学纯α，α-二取代氨基酸衍生物11或12（方案3）。α，α-二取代氨基酸的绝对构型由非对映异构体20、21g'，22d的X射线结构确定。
• Structure–activity study of endomorphin-2 analogs with C-terminal modifications by NMR spectroscopy and molecular modeling
  作者：Chang-lin Wang、Jin-long Yao、Ye Yu、Xuan Shao、Yun Cui、Hong-mei Liu、Lu-hao Lai、Rui Wang

  DOI：10.1016/j.bmc.2008.05.001

  日期：2008.6

  Endomorphin-2 (EM-2) is a putative endogenous mu-opioid receptor ligand. To get insight into the important role of C-terminal amide group of EM-2, we investigated herein a series of EM-2 analogs by substitution of the C-terminal amide group with -NHNH2, -NHCH3, -N(CH3)(2), -OCH3, -OCH2CH3, -OC(CH3) 3, and -CH2 -OH. Their binding affinity and bioactivity were determined and compared. Despite similar (analogs 1, 4, and 7) or decreased (analogs 2, 3,5, and 6) mu affinity in binding assays, all analogs showed low guinea pig ileum (GPI) and mouse vas deferens (MVD) potencies compared to their parent peptide. Interestingly, as for analogs 2 and 3 (a single and double N-methylation of C-terminal amide), the potency order with the K-i (mu) values was 2 > 3; for the C-terminal esterified analogs 4 -6, the potency order with the Ki (mu) values was 4 > 5 > 6. Thus, we concluded that the steric hindrance of C-terminus might play an important role in opioid receptor affinity. We further investigated the conformational properties of these analogs by 1D and 2D H-1 NMR spectroscopy and molecular modeling. Evaluating the ratios of cis-and trans-isomers, aromatic interactions, dihedral angles, and stereoscopic views of the most convergent conformers, we found that modi. cations at the C-terminal amide group of EM-2 affected these analog conformations markedly, therefore changed the opioid receptor affinity and in vitro bioactivity. (c) 2008 Elsevier Ltd. All rights reserved.