Cyclic Aza-peptide Integrin Ligand Synthesis and Biological Activity
作者:Jochen Spiegel、Carlos Mas-Moruno、Horst Kessler、William D. Lubell
DOI:10.1021/jo300311q
日期:2012.6.15
Aza-peptides are obtained by replacement of the α-C-atom of one or more amino acids by a nitrogen atom in a peptide sequence. Introduction of aza-residues into peptide sequences may result in unique structural and pharmacological properties, such that aza-scanning may be used to probe structure–activity relationships. In this study, a general approach for the synthesis of cyclic aza-peptides was developed
their reactivity with the N-terminus of amino acids in the synthesis of model aza-peptide H-AzAA-Ala-Phe-NH2 using BTC (Bis(trichloromethyl) carbonate) as an activator for aza-amino acid precursor. The results of kinetic measurements showed that this method could be used for aza-amino acid incorporation into peptide regardless of the structure of the preceding amino acid. However, for effective coupling
Aza-肽是为避免与药物中的肽不稳定性相关的缺点而开发的拟肽。然而,由于缺乏通过 SPPS(固相肽合成)方法对这些化合物进行有效合成的策略,因此有关它们生物活性的信息非常有限。在此,我们研究了各种氮杂氨基酸(AzGly、AzAla、AzLeu、AzVal)的空间位阻对其在模型氮杂肽 H-AzAA-Ala- 合成中与氨基酸 N 末端的反应性的影响Phe-NH 2使用 BTC(双(三氯甲基)碳酸酯)作为氮杂氨基酸前体的活化剂。动力学测量结果表明,无论前面氨基酸的结构如何,该方法都可用于将氮杂氨基酸掺入肽中。然而,对于 AzGly 的有效偶联,DSC(N,N'-碳酸二琥珀酰亚胺酯)是优选的活化剂。
The present invention relates to peptidic and peptidomimetic compounds with the formula
(X
−
)AA
1
-AA
2
-AA
3
-AA
4
-AA
5
-AA
6
-AA
7
in which the various groups are defined in the description here below, which mimic a particular protein portion of MyD88, preventing its homodimerisation and interfering with its interaction with the TIR domain. The present invention also provides procedures for the preparation of said compounds, pharmaceutical compositions containing them and their use as medicaments, particularly for the treatment of inflammatory and autoimmune diseases.
[EN] MYD88 HOMODIMERIZATION INHIBITORS<br/>[FR] INHIBITEURS D'HOMODIMERISATION DE MYD88
申请人:SIGMA TAU IND FARMACEUTI
公开号:WO2006067091A1
公开(公告)日:2006-06-29
[EN] The present invention relates to peptidic and peptidomimetic compounds with the formula (X-) AA1-AA2-AA3-AA4-AA5-AA6-AA7 in which the various groups are defined in the description here below, which mimic a particular protein portion of MyD88, preventing its homodimerisation and interfering with its interaction with the TIR domain. The present invention also provides procedures for the preparation of said compounds, pharmaceutical compositions containing them and their use as medicaments, particularly for the treatment of inflammatory and autoimmune diseases. [FR] La présente invention concerne des composés peptidiques et peptidomimétiques de la formule (X-) AA1-AA2-AA3-AA4-AA5-AA6-AA7, dans laquelle les divers groupes sont tels que définis dans le mémorandum descriptif, et qui imitent une partie protéique particulière de MyD88 empêchant ainsi son homodimérisation et interférant dans son interaction avec le domaine TIR. L'invention concerne également des procédures destinées à la préparation desdits composés, des compositions pharmaceutiques contenant ces composés et l'utilisation de ces composés comme médicaments, en particulier pour le traitement de maladies inflammatoires ou autoimmunes.