1
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Wei X, Douchez A, Lubell WD. 1,3,5,8-Tetrasubstituted 1,3,4-Benzotriazepin-2-one Scaffolds for β-Turn Mimicry without Stereogenic Carbon Centers: Synthesis and Conformational Analysis. J Org Chem 2023; 88:4633-4648. [PMID: 36930829 DOI: 10.1021/acs.joc.3c00113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
Topological mimicry of peptide β-turn secondary structures has been investigated using a 1,3,5,8-tetrasubstituted 1,3,4-benzotriazepin-2-one scaffold. Approaches were conceived for the synthesis of tetrasubstituted benzotriazepinones from 4-acetyl-3-aminobenzoate based on aza-amino acid chemistry and different orthogonal protection strategies. Installation of an 8-position carboxylate on the aromatic ring enabled a diverse array of substituents to be introduced for mimicry of the i-position residue. Benzotriazepin-2-one crystallization and X-ray analysis demonstrated that in spite the absence of a stereogenic carbon center, the scaffold could serve as type I and I' β-turn mimics, because pyramidalization of the N3-nitrogen in the benzotriazepin-2-one provides potential for adoptive chirality. 1,3,5,8-Tetrasubstituted 1,3,4-benzotriazepin-2-one scaffolds offer interesting potential for the cost-effective synthesis of nonpeptide β-turn surrogates for peptide mimicry in various recognition events.
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Affiliation(s)
- Xiaozheng Wei
- Département de Chimie, Université de Montréal, 1375 Ave. Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | - Antoine Douchez
- Département de Chimie, Université de Montréal, 1375 Ave. Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | - William D Lubell
- Département de Chimie, Université de Montréal, 1375 Ave. Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
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2
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Härk HH, Troska A, Arujõe M, Burk P, Järv J, Ploom A. Kinetic study of aza-amino acid incorporation into peptide chains: Influence of the steric effect of the side chain. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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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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4
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Melton SD, Smith MS, Chenoweth DM. Incorporation of Aza-Glycine into Collagen Peptides. J Org Chem 2019; 85:1706-1711. [DOI: 10.1021/acs.joc.9b02539] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Samuel D. Melton
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Mason S. Smith
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - David M. Chenoweth
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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5
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Aza-Amino Acids Disrupt β-Sheet Secondary Structures. Molecules 2019; 24:molecules24101919. [PMID: 31109055 PMCID: PMC6572070 DOI: 10.3390/molecules24101919] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 05/15/2019] [Accepted: 05/17/2019] [Indexed: 01/29/2023] Open
Abstract
Cα to N substitution in aza-amino acids imposes local conformational constraints, changes in hydrogen bonding properties, and leads to adaptive chirality at the nitrogen atom. These properties can be exploited in mimicry and stabilization of peptide secondary structures and self-assembly. Here, the effect of a single aza-amino acid incorporation located in the upper β-strand at a hydrogen-bonded (HB) site of a β-hairpin model peptide (H-Arg-Tyr-Val-Glu-Val-d-Pro-Gly-Orn-Lys-Ile-Leu-Gln-NH2) is reported. Specifically, analogs in which valine3 was substituted for aza-valine3 or aza-glycine3 were synthesized, and their β-hairpin stabilities were examined using Nuclear Magnetic Resonance (NMR) spectroscopy. The azapeptide analogs were found to destabilize β-hairpin formation compared to the parent peptide. The aza-valine3 residue was more disruptive of β-hairpin geometry than its aza-glycine3 counterpart.
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6
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Chingle R, Mulumba M, Chung NN, Nguyen TMD, Ong H, Ballet S, Schiller PW, Lubell WD. Solid-Phase Azopeptide Diels–Alder Chemistry for Aza-pipecolyl Residue Synthesis To Study Peptide Conformation. J Org Chem 2019; 84:6006-6016. [DOI: 10.1021/acs.joc.8b03283] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | | | - Nga N. Chung
- Laboratory of Chemical Biology and Peptide Research, Clinical Research Institute of Montreal, 110 Pine Avenue West, Montréal, Québec H2W 1R7, Canada
| | - Thi M.-D. Nguyen
- Laboratory of Chemical Biology and Peptide Research, Clinical Research Institute of Montreal, 110 Pine Avenue West, Montréal, Québec H2W 1R7, Canada
| | | | - Steven Ballet
- Research Group of Organic Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Peter W. Schiller
- Laboratory of Chemical Biology and Peptide Research, Clinical Research Institute of Montreal, 110 Pine Avenue West, Montréal, Québec H2W 1R7, Canada
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7
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Chignen Possi K, Mulumba M, Omri S, Garcia-Ramos Y, Tahiri H, Chemtob S, Ong H, Lubell WD. Influences of Histidine-1 and Azaphenylalanine-4 on the Affinity, Anti-inflammatory, and Antiangiogenic Activities of Azapeptide Cluster of Differentiation 36 Receptor Modulators. J Med Chem 2017; 60:9263-9274. [DOI: 10.1021/acs.jmedchem.7b01209] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Kelvine Chignen Possi
- Département
de Chimie, ‡Département de Pédiatrie, and §Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale, Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Mukandila Mulumba
- Département
de Chimie, ‡Département de Pédiatrie, and §Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale, Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Samy Omri
- Département
de Chimie, ‡Département de Pédiatrie, and §Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale, Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Yesica Garcia-Ramos
- Département
de Chimie, ‡Département de Pédiatrie, and §Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale, Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Houda Tahiri
- Département
de Chimie, ‡Département de Pédiatrie, and §Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale, Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Sylvain Chemtob
- Département
de Chimie, ‡Département de Pédiatrie, and §Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale, Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Huy Ong
- Département
de Chimie, ‡Département de Pédiatrie, and §Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale, Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - William D. Lubell
- Département
de Chimie, ‡Département de Pédiatrie, and §Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale, Centre-Ville, Montréal, Québec H3C 3J7, Canada
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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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Singh S, Shrivastava R, Singh G, Ali R, Sankar Ampapathi R, Bhadhuria S, Haq W. AzaGly-Appended Peptidomimetics Structurally Related to PTR6154 as Potential PKB/Akt Inhibitors. Chembiochem 2017; 18:1061-1065. [DOI: 10.1002/cbic.201700031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Shalini Singh
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow Uttar Pradesh 226031 India
| | - Richa Shrivastava
- Toxicology Division; CSIR-Central Drug Research Institute; Lucknow Uttar Pradesh 226031 India
- Academy of Scientific and Innovative Research; New Delhi 11000 India
| | - Gajendra Singh
- NMR Centre; SAIF; CSIR-Central Drug Research Institute; Lucknow Uttar Pradesh 226031 India
- Academy of Scientific and Innovative Research; New Delhi 11000 India
| | - Rafat Ali
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow Uttar Pradesh 226031 India
| | - Ravi Sankar Ampapathi
- NMR Centre; SAIF; CSIR-Central Drug Research Institute; Lucknow Uttar Pradesh 226031 India
- Academy of Scientific and Innovative Research; New Delhi 11000 India
| | - Smrati Bhadhuria
- Toxicology Division; CSIR-Central Drug Research Institute; Lucknow Uttar Pradesh 226031 India
- Academy of Scientific and Innovative Research; New Delhi 11000 India
| | - Wahajul Haq
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow Uttar Pradesh 226031 India
- Academy of Scientific and Innovative Research; New Delhi 11000 India
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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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11
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Chingle R, Ratni S, Claing A, Lubell WD. Application of constrained aza-valine analogs for Smac mimicry. Biopolymers 2016; 106:235-44. [DOI: 10.1002/bip.22851] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 03/31/2016] [Accepted: 04/05/2016] [Indexed: 01/06/2023]
Affiliation(s)
- Ramesh Chingle
- Département De Chimie; Université De Montréal, C.P. 6128, Succursale Centre-Ville, Montréal; QC H3C 3J7 Canada
| | - Sara Ratni
- Département De Pharmacologie; Université De Montréal, C.P. 6128, Succursale Centre-Ville, Montréal; QC H3C 3J7 Canada
| | - Audrey Claing
- Département De Pharmacologie; Université De Montréal, C.P. 6128, Succursale Centre-Ville, Montréal; QC H3C 3J7 Canada
| | - William D. Lubell
- Département De Chimie; Université De Montréal, C.P. 6128, Succursale Centre-Ville, Montréal; QC H3C 3J7 Canada
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12
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Affiliation(s)
- Ramesh Chingle
- 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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13
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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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14
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Synthesis and alkylation of Aza-Gly-Pro building blocks of peptidomimetic libraries for developing prostaglandin F2α receptor modulators as therapeutics to inhibit preterm labor. Methods Mol Biol 2015. [PMID: 25616327 DOI: 10.1007/978-1-4939-2020-4_6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Premature birth is a steadily increasing unmet medical need, for which new "tocolytic" agents are required to arrest contractions and delay labor. A peptide-based approach was developed to produce modulators of the prostaglandin F2α receptor as a novel target for tocolytic development. In this strategy, the solution-phase synthesis and alkylation of aza-glycyl-proline building blocks were key for the preparation of a series of modulators exhibiting biased signaling. An optimized method is now provided for making the aza-Gly-Pro unit with minimum side product, and alkylation of the unit is described to illustrate the library diversification step. Conditions have been reported for selectively unmasking the protecting groups at the N- and C-terminal of the aza-dipeptide unit and for its introduction into analogs that modulate the signaling of the PGF2α receptor. The merits of this protocol for azapeptide synthesis have thus been demonstrated by the synthesis of inhibitors of myometrial contraction exhibiting potential as prototypes for developing tocolytics to treat preterm labor.
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15
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Khashper A, Lubell WD. Design, synthesis, conformational analysis and application of indolizidin-2-one dipeptide mimics. Org Biomol Chem 2015; 12:5052-70. [PMID: 24899358 DOI: 10.1039/c4ob00777h] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Growth in the field of peptide mimicry over the past few decades has resulted in the synthesis of many new compounds and the investigation of novel pharmacological agents. Azabicyclo[X.Y.0]alkanone amino acids are among the attractive classes of constrained mimics, because they can create rigid peptide structures for probing the conformation and roles of natural motifs in recognition events important for biological activity. Herein, we review the last ten years of the synthesis, conformational analysis and activity of analogs of the azabicyclo[4.3.0]alkan-2-one amino acid subclass, so-called indolizidin-2-one amino acids, with particular attention on their employment as inputs for biological applications.
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Affiliation(s)
- Arkady Khashper
- Département de Chimie, Université de Montréal, Montréal H3C 3J7, Canada.
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Bourguet CB, Claing A, Laporte SA, Hébert TE, Chemtob S, Lubell WD. Synthesis of azabicycloalkanone amino acid and azapeptide mimics and their application as modulators of the prostaglandin F2α receptor for delaying preterm birth. CAN J CHEM 2014. [DOI: 10.1139/cjc-2014-0289] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Premature birth (<37 weeks gestation) is the major cause of perinatal mortality and morbidity and has been steadily increasing worldwide. Towards the rational design of more effective therapeutic agents for inhibiting uterine contractions and prolonging gestation (a so-called tocolytic drug), our team has targeted the prostaglandin F2α receptor (FP) employing a peptidomimetic approach designed to provide modulators of this novel target. We identified first a lead peptide (PDC113) (1) based on the sequence of the second extracellular loop of FP on the basis that the loop itself might modulate receptor activation. Systematic study of the structure−activity relationships of 1 generated hypotheses concerning the conformation and side-chains responsible for activity that led to the synthesis of PDC113.31 (2), a potent all d-amino acid peptide, which has successfully completed Phase 1b clinical trials. Employing indolizidinone amino acids, peptide mimics were developed that served to probe the mechanism of FP modulation. For example, PDC113.824 (9) was shown to allosterically regulate FP activity contingent on the presence of prostaglandin F2α by a mechanism implicating biased signalling. Although attempts to understand the turn geometry responsible for the activity of 9 by replacement of its indolizidin-2-one moiety with other azabicycloalkanones failed to produce biologically active analogs, employment of aza-aminoacyl-proline analogs resulted in a series of FP modulators exhibiting distinct effects on different G protein-mediated signalling pathways. Our program has thus contributed novel probes for understanding the chemical biology of FP as well as new therapeutic agents with promise for inhibiting uterine contractions and preventing preterm birth.
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Affiliation(s)
- Carine B. Bourguet
- Département de Chimie, Université de Montréal, C.P.6128. Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
| | - Audrey Claing
- Département de Pharmacologie, Université de Montréal, C.P.6128. Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
| | - Stéphane A. Laporte
- Department of Medicine, McGill University Health Center Research Institute, Montréal, QC H3A 1A1, Canada
| | - Terence E. Hébert
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 1Y6, Canada
| | - Sylvain Chemtob
- Centre Hospitalier Universitaire Sainte-Justine Research Center, Montréal, QC H3T 1C5, Canada
| | - William D. Lubell
- Département de Chimie, Université de Montréal, C.P.6128. Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
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17
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Bourguet CB, Boulay PL, Claing A, Lubell WD. Design and synthesis of novel azapeptide activators of apoptosis mediated by caspase-9 in cancer cells. Bioorg Med Chem Lett 2014; 24:3361-5. [DOI: 10.1016/j.bmcl.2014.05.095] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 05/26/2014] [Accepted: 05/28/2014] [Indexed: 10/25/2022]
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18
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Affiliation(s)
- Ngoc-Duc Doan
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec Canada H3C 3J7
| | - Robert Hopewell
- 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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Melnyk O, Ollivier N, Besret S, Melnyk P. Phenylthiocarbamate or N-carbothiophenyl group chemistry in peptide synthesis and bioconjugation. Bioconjug Chem 2014; 25:629-39. [PMID: 24641212 PMCID: PMC4064696 DOI: 10.1021/bc500052r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
![]()
The design of novel chemoselective
and site-specific ligation methods
provides new tools for obtaining complex scaffolds, peptidomimetics,
and peptide conjugates. The chemistry of the N-phenylthiocarbonyl
group has led to several developments in peptide ligation chemistry
and peptide bioconjugation during the last 10 years. The aim of this
review is to provide an overview of this emerging field.
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Garcia-Ramos Y, Lubell WD. Synthesis and alkylation of aza-glycinyl dipeptide building blocks. J Pept Sci 2013; 19:725-9. [DOI: 10.1002/psc.2572] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 09/12/2013] [Accepted: 09/14/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Yesica Garcia-Ramos
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montreal Quebec H3C 3J7 Canada
| | - William D. Lubell
- Département de Chimie; Université de Montréal; C.P. 6128, Succursale Centre-Ville Montreal Quebec H3C 3J7 Canada
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Garcia-Ramos Y, Proulx C, Lubell WD. Synthesis of hydrazine and azapeptide derivatives by alkylation of carbazates and semicarbazones. CAN J CHEM 2012. [DOI: 10.1139/v2012-070] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Hydrazine and azapeptide analogs were synthesized effectively by alkylation of alkylidene carbazates and semicarbazones. In comparisons of benzylidene, benzhydrylidene, and fluorenylidene tert-butyl carbazates in alkylations using bases of different pKb character, superior conversion was obtained using the fluorenone derivative. Mild alkylation conditions were found employing Et4NOH as base and used to convert fluorenylidene tert-butyl carbazate into 13 different protected hydrazines. Moreover, racemization was avoided during alkylation of fluorenylidene semicarbazide in the synthesis of aza-propargylglycinylphenylalanine tert-butyl ester, the protecting groups from which could be selectively removed.
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Affiliation(s)
- Yesica Garcia-Ramos
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montreal, QC H3C 3J7, Canada
| | - Caroline Proulx
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montreal, QC H3C 3J7, Canada
| | - William D. Lubell
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montreal, QC H3C 3J7, Canada
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Spiegel J, Mas-Moruno C, Kessler H, Lubell WD. Cyclic Aza-peptide Integrin Ligand Synthesis and Biological Activity. J Org Chem 2012; 77:5271-8. [DOI: 10.1021/jo300311q] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jochen Spiegel
- Department Chemie, Institute
for Advanced Study, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale
Centre Ville, Montréal, Québec H3C 3J7, Canada
| | - Carlos Mas-Moruno
- Department Chemie, Institute
for Advanced Study, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Horst Kessler
- Department Chemie, Institute
for Advanced Study, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
- Chemistry Department, Faculty
of Science, King Abdulaziz University,
P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - William D. Lubell
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale
Centre Ville, Montréal, Québec H3C 3J7, Canada
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23
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Bourguet CB, Goupil E, Tassy D, Hou X, Thouin E, Polyak F, Hébert TE, Claing A, Laporte SA, Chemtob S, Lubell WD. Targeting the Prostaglandin F2α Receptor for Preventing Preterm Labor with Azapeptide Tocolytics. J Med Chem 2011; 54:6085-97. [DOI: 10.1021/jm200608k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Eugénie Goupil
- Department of Medicine, McGill University Health Center Research Institute, Montréal H3A 1A1, Québec, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montréal H3G 1Y6, Québec, Canada
| | | | - Xin Hou
- Centre Hospitalier Universitaire Sainte-Justine Research Center, Montréal H3T 1C5, Québec, Canada
| | | | | | - Terence E. Hébert
- Department of Pharmacology and Therapeutics, McGill University, Montréal H3G 1Y6, Québec, Canada
| | | | - Stéphane A. Laporte
- Department of Medicine, McGill University Health Center Research Institute, Montréal H3A 1A1, Québec, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montréal H3G 1Y6, Québec, Canada
| | - Sylvain Chemtob
- Department of Pharmacology and Therapeutics, McGill University, Montréal H3G 1Y6, Québec, Canada
- Centre Hospitalier Universitaire Sainte-Justine Research Center, Montréal H3T 1C5, Québec, Canada
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Sabatino D, Proulx C, Pohankova P, Ong H, Lubell WD. Structure–Activity Relationships of GHRP-6 Azapeptide Ligands of the CD36 Scavenger Receptor by Solid-Phase Submonomer Azapeptide Synthesis. J Am Chem Soc 2011; 133:12493-506. [DOI: 10.1021/ja203007u] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange New Jersey 07079, United States
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Abstract
Azapeptides are peptide analogs in which one or more of the amino residues is replaced by a semicarbazide. This substitution of a nitrogen for the α-carbon center results in conformational restrictions, which bend the peptide about the aza-amino acid residue away from a linear geometry. The resulting azapeptide turn conformations have been observed by x-ray crystallography and spectroscopy, as well as predicted based on computational models. In biologically active peptide analogs, the aza-substitution has led to enhanced activity and selectivity as well as improved properties, such as prolonged duration of action and metabolic stability. In light of these characteristics, azapeptides have found important uses as receptor ligands, enzyme inhibitors, drugs, pro-drugs, probes and imaging agents. Recent improvements in synthetic methods for their procurement have ushered in a new era of azapeptide chemistry. This review aims to provide a historical look at the development of azapeptide science along with a focus on recent developments and perspectives on the future of this useful tool for medicinal chemistry.
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Bourguet CB, Proulx C, Klocek S, Sabatino D, Lubell WD. Solution-phase submonomer diversification of aza-dipeptide building blocks and their application in aza-peptide and aza-DKP synthesis. J Pept Sci 2010; 16:284-96. [DOI: 10.1002/psc.1235] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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