1
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Bowles M, Proulx C. Solid phase submonomer azapeptide synthesis. Methods Enzymol 2021; 656:169-190. [PMID: 34325786 DOI: 10.1016/bs.mie.2021.04.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Azapeptides contain at least one aza-amino acid, where the α-carbon has been replaced by a nitrogen atom, and have found broad applicability in fields ranging from medicinal chemistry to biomaterials. In this chapter, we provide a step-by-step protocol for the solid phase submonomer synthesis of azapeptides, which includes three steps: (1) hydrazone activation and coupling onto a resin-bound peptide, (2) chemoselective semicarbazone functionalization for installation of the aza-amino acid side chain, and (3) orthogonal deprotection of the semicarbazone to complete the monomer addition cycle. We focus on semicarbazone functionalization by N-alkylation with primary alkyl halides, and describe conditions for coupling onto aza-amino acids. Such divergent methods accelerate the synthesis of peptidomimetics and allow the rapid introduction of a wide variety of natural and unnatural side chains directly on solid support using easily accessible submonomers.
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Affiliation(s)
- Maxwell Bowles
- Department of Chemistry, North Carolina State University, Raleigh, NC, United States
| | - Caroline Proulx
- Department of Chemistry, North Carolina State University, Raleigh, NC, United States.
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2
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Dai C, Wang F, Zhang D, Xu L, Xia X, Zhang J. Synthesis and Biological Evaluation of N-Aminoimidazolidin-2-one-Containing Angiotensin-(1-7) Peptidomimetics. Org Lett 2020; 22:8475-8479. [PMID: 33104369 DOI: 10.1021/acs.orglett.0c03070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
N-Aminoimidazolidin-2-one (Aid)-containing peptides with a constrained backbone present a novel class of peptidomimetics for drug discovery. The introduction of Aid residues into peptide sequences has been achieved by intramolecular Mitsunobu cyclization of a serine side chain onto the α-NH of an aza-glycine residue. The effectiveness of this new strategy was demonstrated by synthesizing six Aid-containing analogues of angiotensin-(1-7) on solid support. The Aid analogues of angiotensin-(1-7) exhibited increased peptidase stability against human ACE and DPP3 and improved anti-inflammation and antiproliferation activity.
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Affiliation(s)
- Chuan Dai
- Innovative Drug Research Centre (IDRC), Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Fang Wang
- Innovative Drug Research Centre (IDRC), Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Dandan Zhang
- Innovative Drug Research Centre (IDRC), Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Lei Xu
- Innovative Drug Research Centre (IDRC), Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Xuefeng Xia
- Innovative Drug Research Centre (IDRC), Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Jinqiang Zhang
- Innovative Drug Research Centre (IDRC), Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
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3
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Proulx C, Zhang J, Sabatino D, Chemtob S, Ong H, Lubell WD. Synthesis and Biomedical Potential of Azapeptide Modulators of the Cluster of Differentiation 36 Receptor (CD36). Biomedicines 2020; 8:biomedicines8080241. [PMID: 32717955 PMCID: PMC7459725 DOI: 10.3390/biomedicines8080241] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/15/2020] [Accepted: 07/17/2020] [Indexed: 12/14/2022] Open
Abstract
The innovative development of azapeptide analogues of growth hormone releasing peptide-6 (GHRP-6) has produced selective modulators of the cluster of differentiation 36 receptor (CD36). The azapeptide CD36 modulators curb macrophage-driven inflammation and mitigate atherosclerotic and angiogenic pathology. In macrophages activated with Toll-like receptor-2 heterodimer agonist, they reduced nitric oxide production and proinflammatory cytokine release. In a mouse choroidal explant microvascular sprouting model, they inhibited neovascularization. In murine models of cardiovascular injury, CD36-selective azapeptide modulators exhibited cardioprotective and anti-atherosclerotic effects. In subretinal inflammation models, they altered activated mononuclear phagocyte metabolism and decreased immune responses to alleviate subsequent inflammation-dependent neuronal injury associated with retinitis pigmentosa, diabetic retinopathy and age-related macular degeneration. The translation of GHRP-6 to potent and selective linear and cyclic azapeptide modulators of CD36 is outlined in this review which highlights the relevance of turn geometry for activity and the biomedical potential of prototypes for the beneficial treatment of a wide range of cardiovascular, metabolic and immunological disorders.
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Affiliation(s)
- Caroline Proulx
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA;
| | - Jinqiang Zhang
- Innovative Drug Research Centre, Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China;
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Ave, South Orange, NJ 07079, USA;
| | - Sylvain Chemtob
- Département d’Ophtalmologie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada;
| | - Huy Ong
- Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada;
| | - William D. Lubell
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
- Correspondence:
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4
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Poupart J, Hamdane Y, Lubell WD. Synthesis of enantiomerically enriched 4,5-disubstituted N-aminoimidazol-2-one (Nai) peptide turn mimics. CAN J CHEM 2020. [DOI: 10.1139/cjc-2019-0479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
N-Aminoimidazolone (Nai) peptide mimics were synthesized with minimal epimerization by base-promoted 5-endo-dig cyclization of aza-propargylglycine dipeptide acids and hydrazides followed by olefin migration. 5-Position functionalization using Mannich amino methylation and Vilsmeier–Haack formylation has given access to a set of restrained side chain analogs of Asp, Dab, and Hse residues for mimicry of turn form and function.
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Affiliation(s)
- Julien Poupart
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
| | - Yousra Hamdane
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
| | - William D. Lubell
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
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5
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De Marco R, Zhao J, Greco A, Ioannone S, Gentilucci L. In-Peptide Synthesis of Imidazolidin-2-one Scaffolds, Equippable with Proteinogenic or Taggable/Linkable Side Chains, General Promoters of Unusual Secondary Structures. J Org Chem 2019; 84:4992-5004. [DOI: 10.1021/acs.joc.8b03055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rossella De Marco
- Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, 40126 Bologna, Italy
| | - Junwei Zhao
- Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, 40126 Bologna, Italy
| | - Arianna Greco
- Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, 40126 Bologna, Italy
| | - Simone Ioannone
- Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, 40126 Bologna, Italy
| | - Luca Gentilucci
- Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, 40126 Bologna, Italy
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6
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Dai C, Ma J, Li M, Wu W, Xia X, Zhang J. Diversity-oriented submonomer synthesis of azapeptides mediated by the Mitsunobu reaction. Org Chem Front 2019. [DOI: 10.1039/c9qo00296k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new approach featuring the Mitsunobu reaction for the convenient synthesis of azapeptides on a solid support.
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Affiliation(s)
- Chuan Dai
- Innovative Drug Research Centre (IDRC)
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
| | - Jun Ma
- Innovative Drug Research Centre (IDRC)
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
| | - Min Li
- Innovative Drug Research Centre (IDRC)
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
| | - Wen Wu
- Innovative Drug Research Centre (IDRC)
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
| | - Xuefeng Xia
- Innovative Drug Research Centre (IDRC)
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
| | - Jinqiang Zhang
- Innovative Drug Research Centre (IDRC)
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
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7
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Bouzayani N, Marque S, Kacem Y, Kraïem J, Bourdreux F, Marrot J, Ben Hassine B. Chiral arylideneaminoimidazolidin-4-ones: green synthesis and isomerisation mechanism in solution. NEW J CHEM 2019. [DOI: 10.1039/c9nj00022d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Arylideneaminoimidazolidin-4-ones synthesized from (l)-α-amino acid via a full green procedure in water (atom economy 91.7% and E-factor 0.09) have been investigated by NMR spectroscopies and DFT calculations, highlighting a development of the species according to an isomerization mechanism.
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Affiliation(s)
- Nadia Bouzayani
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène
- (UR 11ES56) Université de Monastir
- Faculté des Sciences de Monastir
- avenue de l’environnement
- Monastir 5000
| | - Sylvain Marque
- Université de Versailles
- Saint-Quentin-en-Yvelines
- Institut Lavoisier de Versailles (ILV)
- UMR CNRS 8180
- 45 avenue des Etats-Unis
| | - Yakdhane Kacem
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène
- (UR 11ES56) Université de Monastir
- Faculté des Sciences de Monastir
- avenue de l’environnement
- Monastir 5000
| | - Jamil Kraïem
- Laboratoire de Développement Chimique
- Galénique et Pharmacologique des Médicaments
- Faculté de Pharmacie de Monastir
- Université de Monastir, Rue Avicenne
- 5000 Monastir
| | - Flavien Bourdreux
- Université de Versailles
- Saint-Quentin-en-Yvelines
- Institut Lavoisier de Versailles (ILV)
- UMR CNRS 8180
- 45 avenue des Etats-Unis
| | - Jérôme Marrot
- Université de Versailles
- Saint-Quentin-en-Yvelines
- Institut Lavoisier de Versailles (ILV)
- UMR CNRS 8180
- 45 avenue des Etats-Unis
| | - Béchir Ben Hassine
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène
- (UR 11ES56) Université de Monastir
- Faculté des Sciences de Monastir
- avenue de l’environnement
- Monastir 5000
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8
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Chingle R, Proulx C, Lubell WD. Azapeptide Synthesis Methods for Expanding Side-Chain Diversity for Biomedical Applications. Acc Chem Res 2017; 50:1541-1556. [PMID: 28598597 DOI: 10.1021/acs.accounts.7b00114] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Mimicry of bioactive conformations is critical for peptide-based medicinal chemistry because such peptidomimetics may augment stability, enhance affinity, and increase specificity. Azapeptides are peptidomimetics in which the α-carbon(s) of one or more amino acid residues are substituted by nitrogen. The resulting semicarbazide analogues have been shown to reinforce β-turn conformation through the combination of lone pair-lone pair repulsion of the adjacent hydrazine nitrogen and urea planarity. Substitution of a semicarbazide for an amino amide residue in a peptide may retain biological activity and add benefits such as improved metabolic stability. The applications of azapeptides include receptor ligands, enzyme inhibitors, prodrugs, probes, and imaging agents. Moreover, azapeptides have proven therapeutic utility. For example, the aza-glycinamide analogue of the luteinizing hormone-releasing hormone analogue Zoladex is a potent long-acting agonist currently used in the clinic for the treatment of prostate and breast cancer. However, the use of azapeptides was hampered by tedious solution-phase synthetic routes for selective hydrazine functionalization. A remarkable stride to overcome this bottleneck was made in 2009 through the introduction of the submonomer procedure for azapeptide synthesis, which enabled addition of diverse side chains onto a common semicarbazone intermediate, providing a means to construct azapeptide libraries by solution- and solid-phase chemistry. In brief, aza residues are introduced into the peptide chain using the submonomer strategy by semicarbazone incorporation, deprotonation, N-alkylation, and orthogonal deprotection. Amino acylation of the resulting semicarbazide and elongation gives the desired azapeptide. Since the initial report, a number of chemical transformations have taken advantage of the orthogonal chemistry of semicarbazone residues (e.g., Michael additions and N-arylations). In addition, libraries have been synthesized from libraries by diversification of aza-propargylglycine (e.g., A3 coupling reactions, [1,3]-dipolar cycloadditions, and 5-exo-dig cyclizations) and aza-chloroalkylglycine residues. In addition, oxidation of aza-glycine residues has afforded azopeptides that react in pericyclic reactions (e.g., Diels-Alder and Alder-ene chemistry). The bulk of these transformations of aza-glycine residues have been developed by the Lubell laboratory, which has applied such chemistry in the synthesis of ligands with promising biological activity for treating diseases such as cancer and age-related macular degeneration. Azapeptide analogues of growth hormone-releasing peptide-6 (His-d-Trp-Ala-Trp-d-Phe-Lys-NH2, GHRP-6) have for example been pursued as ligands of the cluster of differentiation 36 receptor (CD36) and show promising activity for the development of treatments for angiogenesis-related diseases, such as age-related macular degeneration, as well as for atherosclerosis. Azapeptides have also been employed to make a series of conformationally constrained second mitochondria-derived activator of caspase (Smac) mimetics that exhibit promising apoptosis-inducing activity in cancer cells. The synthesis of cyclic azapeptide derivatives was used to make an aza scan to study the conformation-activity relationships of the anticancer agent cilengitide, cyclo(RGDf-N(Me)V), and its parent counterpart cyclo(RGDfV), which exhibit potency against human tumor metastasis and tumor-induced angiogenesis. Innovations in the synthesis and application of azapeptides will be presented in this Account, focusing on the creation and use of side-chain diversity in medicinal chemistry.
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Affiliation(s)
- Ramesh Chingle
- Department of Chemistry, Université de Montréal, C. P. 6128, Succursale Centre-Ville, Montreal, Quebec, Canada H3C 3J7
| | - Caroline Proulx
- Department of Chemistry, Université de Montréal, C. P. 6128, Succursale Centre-Ville, Montreal, Quebec, Canada H3C 3J7
| | - William D. Lubell
- Department of Chemistry, Université de Montréal, C. P. 6128, Succursale Centre-Ville, Montreal, Quebec, Canada H3C 3J7
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9
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Paul S, Roy A, Deka SJ, Panda S, Srivastava GN, Trivedi V, Manna D. Synthesis and evaluation of oxindoles as promising inhibitors of the immunosuppressive enzyme indoleamine 2,3-dioxygenase 1. MEDCHEMCOMM 2017; 8:1640-1654. [PMID: 30108875 DOI: 10.1039/c7md00226b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 06/15/2017] [Indexed: 01/29/2023]
Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1) is considered as an important therapeutic target for the treatment of cancer, chronic infections and other diseases that are associated with immune suppression. Recent developments in understanding the catalytic mechanism of the IDO1 enzyme revealed that conversion of l-tryptophan (l-Trp) to N-formylkynurenine proceeded through an epoxide intermediate state. Accordingly, we synthesized a series of 3-substituted oxindoles from l-Trp, tryptamine and isatin. Compounds with C3-substituted oxindole moieties showed moderate inhibitory activity against the purified human IDO1 enzyme. Their optimization led to the identification of potent compounds, 6, 22, 23 and 25 (IC50 = 0.19 to 0.62 μM), which are competitive inhibitors of IDO1 with respect to l-Trp. These potent compounds also showed IDO1 inhibition potencies in the low-micromolar range (IC50 = 0.33-0.49 μM) in MDA-MB-231 cells. The cytotoxicity of these potent compounds was trivial in different model cancer (MDA-MB-231, A549 and HeLa) cells and macrophage (J774A.1) cells. Stronger selectivity for the IDO1 enzyme (124 to 210-fold) over the tryptophan 2,3-dioxygenase (TDO) enzyme was also observed for these compounds. These results suggest that the oxindole moiety of the compounds could mimic the epoxide intermediate state of l-Trp. Therefore, the structural simplicity and low-micromolar inhibition potencies of these 3-substituted oxindoles make them quite attractive for further investigation of IDO1 function and immunotherapeutic applications.
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Affiliation(s)
- Saurav Paul
- Department of Chemistry , Indian Institute of Technology Guwahati , Assam 781039 , India . dmanna@iitg. ernet.in
| | - Ashalata Roy
- Department of Chemistry , Indian Institute of Technology Guwahati , Assam 781039 , India . dmanna@iitg. ernet.in
| | - Suman Jyoti Deka
- Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Assam 781039 , India
| | - Subhankar Panda
- Department of Chemistry , Indian Institute of Technology Guwahati , Assam 781039 , India . dmanna@iitg. ernet.in
| | - Gopal Narayan Srivastava
- Department of Chemistry , Indian Institute of Technology Guwahati , Assam 781039 , India . dmanna@iitg. ernet.in
| | - Vishal Trivedi
- Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Assam 781039 , India
| | - Debasis Manna
- Department of Chemistry , Indian Institute of Technology Guwahati , Assam 781039 , India . dmanna@iitg. ernet.in
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10
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Beadle JD, Knuhtsen A, Hoose A, Raubo P, Jamieson AG, Shipman M. Solid-Phase Synthesis of Oxetane Modified Peptides. Org Lett 2017; 19:3303-3306. [PMID: 28585839 DOI: 10.1021/acs.orglett.7b01466] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Solid-phase peptide synthesis (SPPS) is used to create peptidomimetics in which one of the backbone amide C═O bonds is replaced by a four-membered oxetane ring. The oxetane containing dipeptide building blocks are made in three steps in solution, then integrated into peptide chains by conventional Fmoc SPPS. This methodology is used to make a range of peptides in high purity including backbone modified derivatives of the nonapeptide bradykinin and Met- and Leu-enkephalin.
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Affiliation(s)
- Jonathan D Beadle
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, U.K
| | - Astrid Knuhtsen
- School of Chemistry, University of Glasgow , Joseph Black Building, University Avenue, Glasgow G12 8QQ, U.K
| | - Alex Hoose
- School of Chemistry, University of Glasgow , Joseph Black Building, University Avenue, Glasgow G12 8QQ, U.K
| | - Piotr Raubo
- IMED Oncology, AstraZeneca , 310 Cambridge Science Park, Milton Road, Cambridge CB4 0WG, U.K
| | - Andrew G Jamieson
- School of Chemistry, University of Glasgow , Joseph Black Building, University Avenue, Glasgow G12 8QQ, U.K
| | - Michael Shipman
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, U.K
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11
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St-Cyr DJ, García-Ramos Y, Doan ND, Lubell WD. Aminolactam, N-Aminoimidazolone, and N-Aminoimdazolidinone Peptide Mimics. TOPICS IN HETEROCYCLIC CHEMISTRY 2017. [DOI: 10.1007/7081_2017_204] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Doan ND, Lubell WD. X-ray structure analysis revealsβ-turn mimicry byN-amino-imidazolidin-2-ones†. Biopolymers 2015; 104:629-35. [DOI: 10.1002/bip.22646] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 03/02/2015] [Accepted: 03/07/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Ngoc-Duc Doan
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montréal QC Canada H3C 3J7
- Department of Chemistry; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139
| | - William D. Lubell
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montréal QC Canada H3C 3J7
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13
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Kennedy MD, Bailey SJ, Wales SM, Keller PA. Enantiopure Trans-4,5-Disubstituted 2-Imidazolidinones via Copper(I)-Catalyzed Ring Opening of 1,1′-DiBoc-2,2′-Biaziridine with Grignard Reagents. J Org Chem 2015; 80:5992-8. [DOI: 10.1021/acs.joc.5b00832] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew D. Kennedy
- School
of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Stephen J. Bailey
- School
of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Steven M. Wales
- School
of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Paul A. Keller
- School
of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia
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14
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Doan ND, Zhang J, Traoré M, Kamdem W, Lubell WD. Solid-phase synthesis of C-terminal azapeptides. J Pept Sci 2014; 21:387-91. [DOI: 10.1002/psc.2711] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 10/04/2014] [Accepted: 10/13/2014] [Indexed: 12/21/2022]
Affiliation(s)
- Ngoc-Duc Doan
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montréal Québec H3C 3J7 Canada
| | - Jinqiang Zhang
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montréal Québec H3C 3J7 Canada
| | - Mariam Traoré
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montréal Québec H3C 3J7 Canada
| | - Winnie Kamdem
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montréal Québec H3C 3J7 Canada
| | - William D. Lubell
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montréal Québec H3C 3J7 Canada
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15
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Kang CW, Ranatunga S, Sarnowski MP, Del Valle JR. Solid-phase synthesis of tetrahydropyridazinedione-constrained peptides. Org Lett 2014; 16:5434-7. [PMID: 25295511 PMCID: PMC4201324 DOI: 10.1021/ol5026684] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
![]()
The
design and solid-phase synthesis of tetrahydropyridazine-3,6-dione
(Tpd) peptidomimetics derived from backbone-aminated peptides is reported.
The described protocol features the synthesis of chiral α-hydrazino
acids suitable for chemoselective incorporation into growing peptide
chains. Acid-catalyzed cyclization to form the Tpd ring during cleavage
affords the target peptidomimetics in good yield and purity. The scope
of Tpd incorporation is demonstrated through the synthesis of constrained
peptides featuring nucleophilic/electrophilic side chains and sterically
encumbered α-substituted hydrazino acid residues.
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Affiliation(s)
- Chang Won Kang
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute , Tampa, Florida 33612, United States
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Traoré M, Doan ND, Lubell WD. Diversity-Oriented Synthesis of Azapeptides with Basic Amino Acid Residues: Aza-Lysine, Aza-Ornithine, and Aza-Arginine. Org Lett 2014; 16:3588-91. [DOI: 10.1021/ol501586y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mariam Traoré
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec, Canada H3C 3J7
| | - Ngoc-Duc Doan
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec, Canada H3C 3J7
| | - William D. Lubell
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec, Canada H3C 3J7
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