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Dalal A, Bodak S, Babu SA. Picolinamide-assisted ortho-C-H functionalization of pyrenylglycine derivatives using aryl iodides. Org Biomol Chem 2024; 22:1279-1298. [PMID: 38258893 DOI: 10.1039/d3ob01731a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Chemical transformations involving the pyrenylglycine motif (an unnatural amino acid) and practical methods toward it are seldom known. This work aimed at developing a method for synthesizing novel pyrenylglycine (pyrene-based glycine) unnatural amino acid derivatives. To realize this, initially, a new pyrenylglycine substrate possessing the picolinamide moiety was assembled via the Ugi multicomponent reaction. The picolinamide moiety linked to amine substrates is a well-known bidentate directing group for accomplishing the site-selective γ-C-H functionalization of amines. Subsequently, it was aimed at using a Pd(II)-catalyzed bidentate directing group-aided γ-C-H arylation strategy for generating a wide range of unprecedented examples of C(2)-H arylated pyrenylglycines. Accordingly, pyrenylglycine possessing the picolinamide moiety was subjected to Pd(II)-catalyzed C(2)-H arylation in the non-K-region to afford a library of C(2)-arylated pyrenylglycines (π-extended pyrenes). Additionally, pyrenylglycine-based small peptides were assembled using C(2)-arylated pyrenylglycines. The X-ray structure of a representative compound was obtained, which corroborated the structure of pyrenylglycine and the regioselectivity of C(2)-H arylation of the pyrene in the non-K-region.
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Affiliation(s)
- Arup Dalal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Subhankar Bodak
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
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Gilbert N, Ricard S, Bergeron J, Lambolez P, Daoust B. Synthesis of Exo- and Endocyclic Enamides Through Copper-Catalyzed Regioselective Intramolecular N
-Halovinylation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nicolas Gilbert
- Département de Chimie, Biochimie et Physique; Université du Québec à Trois-Rivières; CP 500 Trois-Rivières Québec Canada
| | - Simon Ricard
- Département de Chimie, Biochimie et Physique; Université du Québec à Trois-Rivières; CP 500 Trois-Rivières Québec Canada
| | - Jodrey Bergeron
- Département de Chimie, Biochimie et Physique; Université du Québec à Trois-Rivières; CP 500 Trois-Rivières Québec Canada
| | - Pierre Lambolez
- Département de Chimie, Biochimie et Physique; Université du Québec à Trois-Rivières; CP 500 Trois-Rivières Québec Canada
| | - Benoit Daoust
- Département de Chimie, Biochimie et Physique; Université du Québec à Trois-Rivières; CP 500 Trois-Rivières Québec Canada
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Harkiss AH, Sutherland A. Recent advances in the synthesis and application of fluorescent α-amino acids. Org Biomol Chem 2016; 14:8911-8921. [DOI: 10.1039/c6ob01715k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The design and synthesis of new fluorescent α-amino acids as well as their application in imaging of biological systems has been reviewed.
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Affiliation(s)
- Alexander H. Harkiss
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow G12 8QQ
| | - Andrew Sutherland
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow G12 8QQ
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Vilaça H, Pereira G, Castro TG, Hermenegildo BF, Shi J, Faria TQ, Micaêlo N, Brito RMM, Xu B, Castanheira EMS, Martins JA, Ferreira PMT. New self-assembled supramolecular hydrogels based on dehydropeptides. J Mater Chem B 2015; 3:6355-6367. [PMID: 32262754 DOI: 10.1039/c5tb00501a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Supramolecular hydrogels rely on small molecules that self-assemble in water as a result of the cooperative effect of several relatively weak intermolecular interactions. Peptide-based low molecular weight hydrogelators have attracted enormous interest owing to the simplicity of small molecules combined with the versatility and biocompatibility of peptides. In this work, naproxen, a well known non-steroidal anti-inflammatory drug, was N-conjugated with various dehydrodipeptides to give aromatic peptide amphiphiles that resist proteolysis. Molecular dynamics simulations were used to obtain insight into the underlying molecular mechanism of self-assembly and to rationalize the design of this type of hydrogelators. The results obtained were in excellent agreement with the experimental observations. Only dehydrodipeptides having at least one aromatic amino acid gave hydrogels. The characterization of the hydrogels was carried out using transmission electron microscopy (TEM), circular dichroism (CD), fluorescence spectroscopy and also rheological assays.
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Affiliation(s)
- H Vilaça
- Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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Hermenegildo BF, Pereira G, Abreu AS, Castanheira EM, Ferreira PM, Queiroz MJR. Phenanthrenyl-indole as a fluorescent probe for peptides and lipid membranes. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.04.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Buczek A, Siodłak D, Bujak M, Broda MA. Effects of side-chain orientation on the backbone conformation of the dehydrophenylalanine residue. Theoretical and X-ray study. J Phys Chem B 2011; 115:4295-306. [PMID: 21443240 DOI: 10.1021/jp200949t] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two E isomers of α,β-dehydro-phenylalanine, Ac-(E)-ΔPhe-NHMe (1a) and Ac-(E)-ΔPhe-NMe(2) (2a), have been synthesized and their low temperature structures determined by single-crystal X-ray diffraction. A systematic theoretical analysis was performed on these molecules and their Z isomers (1b and 2b). The ϕ,ψ potential energy surfaces were calculated at the MP2/6-31+G(d,p) and B3LYP/6-31+G(d,p) levels in the gas phase and at the B3LYP/6-31+G(d,p) level in the chloroform and water solutions with the SCRF-PCM method. All minima were fully optimized by the MP2 and DFT methods, and their relative stabilities were analyzed in terms of π-conjugation, internal H-bonds, and dipole-dipole interactions between carbonyl groups. The results indicate that all the studied compounds can adopt the conformation H (ϕ, ψ ≈ ±40°, ∓120°) which is atypical for standard amino acids residues. A different arrangement of the side chain in the E and Z isomers causes them to have different conformational preferences. In the presence of a polar solvent both Z isomers of ΔPhe (1b and 2b) are found to adopt the 3(10)-helical conformation (left- and right-handed are equally likely). On the other hand, this conformation is not accessible or highly energetic for E isomers of ΔPhe (1a and 2a). Those isomers have an intrinsic inclination to have an extended conformation. The conformational space of the Z isomers is much more restricted than that of the E derivative both in the gas phase and in solution. In the gas phase the E isomers of ΔPhe have lower energies than the Z ones, but in the aqueous solution the energy order is reversed.
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Affiliation(s)
- Aneta Buczek
- Faculty of Chemistry, University of Opole, Poland
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Ferreira PM, Monteiro LS, Castanheira EM, Pereira G, Lopes C, Vilaça H. Electrochemical reduction of dehydroamino acids: synthesis and photophysical properties of β,β-diarylalanines. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.10.087] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Canevet D, Pérez del Pino Á, Amabilino DB, Sallé M. Varied nanostructures from a single multifunctional molecular material. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02302g] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ferreira PM, Castanheira EM, Monteiro LS, Pereira G, Vilaça H. A mild high yielding synthesis of oxazole-4-carboxylate derivatives. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Synthesis and electrochemical behaviour of β-halodehydroamino acid derivatives. Amino Acids 2010; 39:499-513. [DOI: 10.1007/s00726-009-0466-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2009] [Accepted: 12/24/2009] [Indexed: 10/19/2022]
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Broda MA, Buczek A, Siodłak D, Rzeszotarska B. The effect of beta-methylation on the conformation of alpha, beta-dehydrophenylalanine: a DFT study. J Pept Sci 2009; 15:465-73. [PMID: 19408247 DOI: 10.1002/psc.1137] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Dehydroamino acids are non-coded amino acids that offer unique conformational properties. Dehydrophenylalanine (DeltaPhe) is most commonly used to modify bioactive peptides to constrain the topography of the phenyl ring in the side chain, which commonly serves as a pharmacophore. The Ramachandran maps (in the gas phase and in CHCl(3) mimicking environments) of DeltaPhe analogues with methyl groups at the beta position of the side chain as well as at the C-terminal amide were calculated using the B3LYP/6-31 + G** method. Unexpectedly, beta-methylation alone results in an increase of conformational freedom of the affected DeltaPhe residue. However, further modification by introducing an additional methyl group at C-terminal methyl amide results in a steric crowding that fixes the torsion angle psi of all conformers to the value 123 degrees , regardless of the Z or E position of the phenyl ring. The number of conformers is reduced and the accessible conformational space of the residues is very limited. In particular, (Z)-Delta(betaMe)Phe with the tertiary C-terminal amide can be classified as the amino acid derivative that has a single conformational state as it seems to adopt only the beta conformation.
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Pereira G, Abreu AS, Castanheira EMS, Coutinho PJG, Ferreira PMT, Queiroz MJRP. Synthesis and Photophysical Studies of a Pyrenylindole and a Phenalenoindole Obtained from Dehydroamino Acid Derivatives - Application as Fluorescent Probes for Biological Systems. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900351] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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