Constraining the Side Chain of C-Terminal Amino Acids in Apelin-13 Greatly Increases Affinity, Modulates Signaling, and Improves the Pharmacokinetic Profile
[EN] PROCESSES FOR PREPARING AMINO-SUBSTITUTED GAMMA-LACTAMS<br/>[FR] PROCÉDÉS DE SYNTHÈSE DE GAMMA-LACTAMES AMINO-SUBSTITUÉS
申请人:VALORISATION RECH SOC EN COMMA
公开号:WO2010105367A1
公开(公告)日:2010-09-23
The present application describes general process for the preparation of amino-substitued gamma-lactams involving the reaction of synthons of the general Formulae (I) and (VI): with amines. The processes are amenable to solid phase synthetic techniques and therefore allow the efficient incorporation of amino-substitued gamma-lactams into a wide variety of structural scaffolds, including, in particular peptides.
Using conformational constraints at position 6 of Angiotensin II to generate compounds with enhanced AT2R selectivity and proteolytic stability
作者:Dirk Tourwé、Antonis D. Tsiailanis、Nikolaos Parisis、Baydaa Hirmiz、Mark Del Borgo、Marie-Isabel Aguilar、Olivier Van der Poorten、Steven Ballet、Robert E. Widdop、Andreas G. Tzakos
DOI:10.1016/j.bmcl.2021.128086
日期:2021.7
aminoacids located at positions 6 and 7 with various conformationally constrained analogues to enhance both the selectivity and stability. We report the development of high-affinity AT2R binders, which displayed high selectivity for AT2R versus AT1R. Furthermore, all analogues presented enhancedstability in human plasma with respect to the parent hormone Angiotensin II as also [Y]6-AII.
PROCESSES FOR PREPARING AMINO-SUBSTITUTED GAMMA-LACTAMS
申请人:Lubell William
公开号:US20120101257A1
公开(公告)日:2012-04-26
The present application describes general process for the preparation of amino-substituted gamma-lactams involving the reaction of synthons of the general Formulae (I) and (VI): with amines. The processes are amenable to solid phase synthetic techniques and therefore allow the efficient incorporation of amino-substituted gamma-lactams into a wide variety of structural scaffolds, including, in particular peptides.
series of peptides containing these building blocks has been synthesized by varying the type, position, and number of modifications. The membranotropic activity of the RW9 analogs was studied by spectrofluorescence titration of the peptides in presence of liposomes (DMPG), allowing to calculate partition coefficients (Kp). Our results indicate that the partitioning of the modifiedpeptides depends on
Indoloazepinone-Constrained Oligomers as Cell-Penetrating and Blood-Brain-Barrier-Permeating Compounds
作者:Olivier Van der Poorten、Baptiste Legrand、Lubomir L. Vezenkov、Júlia García-Pindado、Nadir Bettache、Astrid Knuhtsen、Daniel Sejer Pedersen、Macarena Sánchez-Navarro、Jean Martinez、Meritxell Teixidó、Marcel Garcia、Dirk Tourwé、Muriel Amblard、Steven Ballet
DOI:10.1002/cbic.201700678
日期:2018.4.4
AbstractNon‐cationic and amphipathic indoloazepinone‐constrained (Aia) oligomers have been synthesized as new vectors for intracellular delivery. The conformational preferences of the [l‐Aia‐Xxx]n oligomers were investigated by circular dichroism (CD) and NMR spectroscopy. Whereas Boc‐[l‐Aia‐Gly]2,4‐OBn oligomers 12 and 13 and Boc‐[l‐Aia‐β3‐h‐l‐Ala]2,4‐OBn oligomers 16 and 17 were totally or partially disordered, Boc‐[l‐Aia‐l‐Ala]2‐OBn (14) induced a typical turn stabilized by C5‐ and C7‐membered H‐bond pseudo‐cycles and aromatic interactions. Boc‐[l‐Aia‐l‐Ala]4‐OBn (15) exhibited a unique structure with remarkable T‐shaped π‐stacking interactions involving the indole rings of the four l‐Aia residues forming a dense hydrophobic cluster. All of the proposed FITC‐6‐Ahx‐[l‐Aia‐Xxx]4‐NH2 oligomers 19–23, with the exception of FITC‐6‐Ahx‐[l‐Aia‐Gly]4‐NH2 (18), were internalized by MDA‐MB‐231 cells with higher efficiency than the positive references penetratin and Arg8. In parallel, the compounds of this series were successfully explored in an in vitro blood–brain barrier (BBB) permeation assay. Although no passive diffusion permeability was observed for any of the tested Ac‐[l‐Aia‐Xxx]4‐NH2 oligomers in the PAMPA model, Ac‐[l‐Aia‐l‐Arg]4‐NH2 (26) showed significant permeation in the in vitro cell‐based human model of the BBB, suggesting an active mechanism of cell penetration.