Boc-Gly-Gly-OPac | 103339-87-3

• 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: Boc-Gly-Gly-OPac
• CAS: 103339-87-3
• 化学式: C₁₇H₂₂N₂O₆
• 分子量: 350.371
• InChiKey: ZPLGTEVHUNEPNQ-UHFFFAOYSA-N

物化性质

• 沸点：
  551.4±35.0 °C(Predicted)
• 密度：
  1.202±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.05
• 重原子数：
  25.0
• 可旋转键数：
  7.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.41
• 拓扑面积：
  110.8
• 氢给体数：
  2.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  Boc-Gly-Gly-OPac 在 锌 溶剂黄146 、 N,N'-二环己基碳二亚胺 作用下， 反应 6.0h， 生成 t-BuOCO-Gly-Gly-L-Pro-Gly-OH
  参考文献：
  名称：

  Design of the Synthetic Route for Peptides and Proteins Based on the Solubility Prediction Method. I. Synthesis and Solubility Properties of Human Proinsulin C-Peptide Fragments

  摘要：

  利用相对较小的人类胰岛素原C肽片段，展示了溶解度预测方法的实用性。还从以下方面考察了该溶解度预测方法对于含有极性侧链肽的适用性：（1）小于七肽的肽中间体具有高溶解性，与其值无关；（2）肽中间体的值有助于判断等于或大于八肽水平的肽中间体的溶解度；（3）肽链中央位置的Pro残基能有效提高肽的溶解度；（4）存在导致β折叠聚集体引起的不溶性的临界链长度。随后，在肽中间体溶解度预测的基础上，讨论了适用于人胰岛素原C肽合成路线设计的策略。

  DOI：

  10.1246/bcsj.59.2433
• 作为产物：
  描述：

  2-oxo-2-phenylethyl 2-(tert-butoxycarbonylamino)acetate 在 锌 溶剂黄146 、 N,N'-二环己基碳二亚胺 作用下， 反应 3.0h， 生成 Boc-Gly-Gly-OPac
  参考文献：
  名称：

  Design of the Synthetic Route for Peptides and Proteins Based on the Solubility Prediction Method. I. Synthesis and Solubility Properties of Human Proinsulin C-Peptide Fragments

  摘要：

  利用相对较小的人类胰岛素原C肽片段，展示了溶解度预测方法的实用性。还从以下方面考察了该溶解度预测方法对于含有极性侧链肽的适用性：（1）小于七肽的肽中间体具有高溶解性，与其值无关；（2）肽中间体的值有助于判断等于或大于八肽水平的肽中间体的溶解度；（3）肽链中央位置的Pro残基能有效提高肽的溶解度；（4）存在导致β折叠聚集体引起的不溶性的临界链长度。随后，在肽中间体溶解度预测的基础上，讨论了适用于人胰岛素原C肽合成路线设计的策略。

  DOI：

  10.1246/bcsj.59.2433

文献信息

• Synthesis and biological property of .ALPHA.-human atrial natriuretic peptide analogs with a constrained or stereochemically modified cyclic moiety.
  作者：Yoshiharu MINAMITAKE、Mayumi FURUYA、Yasuo KITAJIMA、Maki TAKEHISA、Shoji TANAKA

  DOI：10.1248/cpb.38.1920

  日期：——

  Conformationally restricted analogs of α-human atrial natriuretic peptide (α-hANP) containing L- or D-penicillamine, or D-cysteine in place of cysteine residues at positions 7 and 23 were synthesized by the liquid phase procedure. Their biological properties in the assays of receptor binding and cyclic guanosine monophosphate (cGMP) accumulation employing rat vascular smooth muscle cells (VSMC), vasorelaxant activity using rat isolated aorta were evaluated. We found that the constrained and/or stereochemically altered ring moiety generally did not influence the receptor binding activity, however, cGMP accumulation and vasorelaxant activities were quite sensitive to conformational perturbation. Furthermore, a lack of correlation between cGMP acccumulation activity and vasorelaxant activity was observed. Dissociation between these activities was typical in the case of [DPen7, 23]-α-hANP(7-28), which showed quite weak vasorelaxant activity in spite of its full cGMP accumulation and receptor binding potencies. This result suggests that cGMP accumulation alone is not sufficient to promote AMP-induced vasorelaxation, and that the other second messenger (s) may mediate this activity.

  通过液相法合成了α-人心房钠尿肽（α-hANP）的构象限制性类似物，这些类似物在第7和23位氨基酸残基上分别含有L型或D型的青霉胺，或D型的半胱氨酸。我们评估了这些化合物的生物学特性，包括利用大鼠血管平滑肌细胞（VSMC）进行的受体结合试验和环磷酸鸟苷（cGMP）积累试验，以及使用大鼠离体主动脉进行的血管舒张活性试验。我们发现，受限制和/或立体化学改变的环结构通常不影响受体结合活性，然而，环磷酸鸟苷积累和血管舒张活性对构象扰动相当敏感。此外，我们观察到环磷酸鸟苷积累活性与血管舒张活性之间缺乏相关性。在这些活性之间表现出典型分离的是[DPen7, 23]-α-hANP(7-28)，尽管它具有完全的环磷酸鸟苷积累和受体结合效力，但其血管舒张活性相当弱。这一结果表明，仅环磷酸鸟苷的积累不足以促进ANP诱导的血管舒张，其他第二信使可能介导这一活性。
• Intramolecular Triplet-Triplet Energy Transfer in Short Flexible Bichromophoric Amino Acids, Dipeptides and Carboxylic Acid Diester
  作者：Miroslav Zabadal、Dominik Heger、Petr Klán、Zdeněk Kříž

  DOI：10.1135/cccc20040776

  日期：——

  Efficiencies of the intramolecular triplet-triplet energy transfer (ITET) in various bichromophoric amino acids (glycine, valine, phenylalanine, and sarcosine), dipeptides (glycylglycine, phenylalanylphenylalanine), and a simple diester, with the benzoyl and naphthyl terminal groups serving as donor and acceptor, respectively, have been determined by the steady-state photokinetic measurements. The magnitude of the transfer rate constants (>10⁸ s^-1) and the number of bonds separating the chromophores (8 or 11 atoms) suggest a through-space exothermic exchange mechanism in all cases. The influence of interchromophore distance, the character of the connecting chain as well as of side chains, was evaluated. While the most efficient energy transfer was found in a flexible diester and in valine- and sarcosine-based molecules due to the steric effect of the side hydrocarbon groups, the benzyl groups in the phenylalanine and phenylalanylphenylalanine-based bichromophores had a suppressing effect on ITET. Rigidity of the peptide bond in short bichromophoric compounds causes that a large number of favorable geometries preexist already before excitation; thus the intramolecular processes are controlled by ground-state conformational distribution. Replacing this bond by a less rigid ester moiety would allow that certain unfavorable conformations may coil to favorable ones within the excited-state lifetime (a rotation-controlled photochemical model). Some conclusions were supported by a conformational search of the potential energy surface and molecular dynamics simulations.

  各种双色基氨基酸（甘氨酸、缬氨酸、苯丙氨酸和硫氨酸）、二肽（甘氨酰甘氨酸、苯丙氨酰苯丙氨酸）和一个简单的二酯的分子内三重态-三重态能量转移效率（ITET）通过稳态光动力学测量确定。传递速率常数的大小（>10^8 s^-1）和色团之间的键的数量（8或11个原子）表明在所有情况下都存在一种通过空间的放热交换机制。评估了色团间距离、连接链的性质以及侧链的影响。尽管在柔性二酯和以缬氨酸和硫氨酸为基础的分子中发现了最有效的能量转移，这是由于侧链烃基的立体效应，但苯丙氨酸和苯丙氨酰苯丙氨酸双色基色团中的苄基对ITET有抑制作用。短双色基化合物中肽键的刚性导致在激发之前已经存在大量有利的几何构型，因此分子内过程受基态构象分布控制。用较不刚性的酯基团取代这种键将允许在激发态寿命内某些不利的构象转变为有利的构象（一个受旋转控制的光化学模型）。通过对潜在能量表面的构象搜索和分子动力学模拟支持了一些结论。
• An efficient method for the synthesis of phenacyl ester-protected dipeptides using neutral alumina-supported sodium carbonate ‘Na₂CO₃/n-Al₂O₃’
  作者：Chikao Hashimoto、Kazuhiro Sugimoto、Youhei Takahashi、Mitsuo Kodomari

  DOI：10.1002/psc.2544

  日期：2013.10

  In the synthesis of dipeptides (Boc‐AA1‐AA2‐OPac: AA1 and AA2 represent amino acids) protected by phenacyl (Pac) ester, amines and solid bases as the base for the conversion of the trifluoroacetic acid (TFA) salt of the amino component (TFA·H‐AA2‐OPac) into the corresponding free amino component (H‐AA2‐OPac) were examined. The synthesis of a dipeptide (Boc‐Ala‐Gly‐OPac) using amines for the conversion

  在二苯甲酸酯（Boc-AA 1 -AA 2 -OPac：AA 1和AA 2代表氨基酸）的合成中，由苯甲酰基（Pac）酯，胺和固体碱保护，作为三氟乙酸（TFA）转化的基础检查了氨基成分（TFA·H‐AA 2 ‐ OPac）的盐与相应的游离氨基成分（H‐AA 2 ‐ OPac）的盐。使用胺合成二肽（Boc-Ala-Gly-OPac）的副产物收率不令人满意。另一方面，使用中性氧化铝负载的Na 2 CO 3（Na 2 CO 3 / n-Al 2 O 3）作为转化的固体基础，以定量收率提供了二肽，没有副产物。将Na 2 CO 3 / n-Al 2 O 3应用于一些受Pac酯保护的二肽的合成中，可以以极好的收率得到所需的肽。版权所有©2013欧洲多肽协会和John Wiley＆Sons，Ltd.