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Access to C-protected β-amino-aldehydes via transacetalization of 6-alcoxy tetrahydrooxazinones and use for pseudo-peptide synthesis. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Temperini A, Capperucci A, Degl’Innocenti A, Terlizzi R, Tiecco M. Stereoselective Synthesis of β3-Amino Acids and β-Oligopeptides Promoted by Organoselenium Intermediates. PHOSPHORUS SULFUR 2011. [DOI: 10.1080/10426507.2010.505596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Andrea Temperini
- a Dipartimento di Chimica e Tecnologia del Farmaco, Sezione di Chimica Organica , Università di Perugia , Perugia, Italy
| | | | | | - Raffaella Terlizzi
- a Dipartimento di Chimica e Tecnologia del Farmaco, Sezione di Chimica Organica , Università di Perugia , Perugia, Italy
| | - M Tiecco
- a Dipartimento di Chimica e Tecnologia del Farmaco, Sezione di Chimica Organica , Università di Perugia , Perugia, Italy
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3
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Vasudev PG, Chatterjee S, Shamala N, Balaram P. Structural Chemistry of Peptides Containing Backbone Expanded Amino Acid Residues: Conformational Features of β, γ, and Hybrid Peptides. Chem Rev 2010; 111:657-87. [DOI: 10.1021/cr100100x] [Citation(s) in RCA: 273] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Prema. G. Vasudev
- Department of Physics and Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India
| | - Sunanda Chatterjee
- Department of Physics and Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India
| | - Narayanaswamy Shamala
- Department of Physics and Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India
| | - Padmanabhan Balaram
- Department of Physics and Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India
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4
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Laitar DS, Kramer JW, Whiting BT, Lobkovsky EB, Coates GW. Beta-amidoaldehydes via oxazoline hydroformylation. Chem Commun (Camb) 2009:5704-6. [PMID: 19774242 DOI: 10.1039/b913698c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
4-Substituted oxazolines, which are readily synthesized from naturally occurring alpha-amino acids, are converted efficiently and stereospecifically to beta-amidoaldehydes in the presence of synthesis gas and catalytic dicobalt octacarbonyl.
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Affiliation(s)
- David S Laitar
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, NY 14853-1301, USA
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5
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Temperini A, Terlizzi R, Testaferri L, Tiecco M. Stereospecific Synthesis of β3-Amino Acid Derivatives from Propargylic Alcohols: Efficient Solution-Phase Synthesis of Oligopeptides without Coupling Agents. Chemistry 2009; 15:7883-7895. [DOI: 10.1002/chem.200900701] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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6
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Podstawka E, Ozaki Y. Bombesin-modified 6-14 C-terminal fragments adsorption on silver surfaces: influence of a surface substrate. Biopolymers 2008; 89:941-50. [PMID: 18615492 DOI: 10.1002/bip.21040] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy has been applied to investigate the interaction with a silver colloidal surface of following seven 6-14 fragments of bombesin (BN) C-terminus: cyclo[D-Phe(6),His(7),Leu(14)]BN(6-14), [D-Phe(6),Leu-NHEt(13),des-Met(14)]BN(6-14), [D-Phe(6),Leu(13)-(R)-p-chloro-Phe(14)]BN(6-14), [D-Phe(6),beta-Ala(11),Phe(13),Nle(14)]BN(6-14), [D-Tyr(6),beta-Ala(11),Phe(13),Nle(14)]BN(6-14), [D-Tyr(6),beta-Phe(11),Phe(13),Nle(14)OH]BN(6-14), and [D-Cys(6),Asn(7),D-Ala(11),Cys(14)]BN(6-14), potent r-GRP-R receptor antagonists used in chemotherapy and potential effective drugs in cancer treatment. The adsorption active sites and molecular orientations on the colloidal silver surface have been determined on the basis of SERS "surface selection rules" subsequent to a detailed SERS analysis. In addition, the similarities and differences of these spectra with the SERS spectra of the peptides immobilized on a roughened silver electrode surface have been examined. From the data, suggestion has been made about structural properties of these peptides on the colloidal surface.
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Affiliation(s)
- Edyta Podstawka
- Department of Chemistry, School of Science and Technology, Kwansei-Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan.
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7
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Yin B, Dhal R, Maisonneuve V, Dujardin G. Asymmetric Access to Peptidyl β3-Aldehydes by Coupling ofN-Phthalyl α-Amino Acids with a Synthetic Heterocyclic β-Amino Aldehyde Precursor. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600262] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Gizecki P, Ait Youcef R, Poulard C, Dhal R, Dujardin G. Diastereoselective preparation of novel tetrahydrooxazinones via heterocycloaddition of N-Boc, O-Me-acetals. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.10.154] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Gizecki P, Dhal R, Poulard C, Gosselin P, Dujardin G. Novel use of N-benzoyl-N,O-acetals as N-acylimine equivalents in asymmetric heterocycloaddition: an extended enantioselective pathway to beta-benzamido aldehydes. J Org Chem 2003; 68:4338-44. [PMID: 12762734 DOI: 10.1021/jo0203138] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
For the first time, easily available N-(alpha-methoxyalkyl)amides were successfully used as synthetic equivalents of N-acylimines in an asymmetric heterocycloaddition process. The facial-controlled formation of 6-alkoxydihydrooxazines was thus achieved by SnCl(4)-promoted heterocycloaddition of (R)-O-vinyl pantolactone. By simple acidic hydrolysis of the crude heteroadducts, new beta-aryl- and beta-alkyl-substituted benzamido aldehydes were thus obtained in good overall yields with high enantioselectivities.
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Affiliation(s)
- Patricia Gizecki
- Laboratoire de Synthèse Organique UMR CNRS 6011, Université du Maine, F-72085 Le Mans Cedex 9, France
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Arndt HD, Vescovi A, Schrey A, Pfeifer JR, Koert U. Solution phase synthesis and purification of the minigramicidin ion channels and a succinyl-linked gramicidin. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00179-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Frackenpohl J, Arvidsson PI, Schreiber JV, Seebach D. The Outstanding Biological Stability ofβ- andγ-Peptides toward Proteolytic Enzymes: An In Vitro Investigation with Fifteen Peptidases. Chembiochem 2001. [DOI: 10.1002/1439-7633(20010601)2:6%3c445::aid-cbic445%3e3.0.co%3b2-r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Frackenpohl J, Arvidsson PI, Schreiber JV, Seebach D. The Outstanding Biological Stability ofβ- andγ-Peptides toward Proteolytic Enzymes: An In Vitro Investigation with Fifteen Peptidases. Chembiochem 2001. [DOI: 10.1002/1439-7633(20010601)2:6<445::aid-cbic445>3.0.co;2-r] [Citation(s) in RCA: 319] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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13
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Rivier J, Lahrichi SL, Gulyas J, Erchegyi J, Koerber SC, Craig AG, Corrigan A, Rivier C, Vale W. Minimal-size, constrained corticotropin-releasing factor agonists with i-(i+3) Glu-Lys and Lys-Glu bridges. J Med Chem 1998; 41:2614-20. [PMID: 9651165 DOI: 10.1021/jm980164e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In three earlier publications (Miranda et al. J. Med. Chem. 1994, 37, 1450-1459; 1997, 40, 3651-3658; Gulyas et al. Proc. Natl. Acad. Sci. U.S.A. 1995, 92, 10575-10579) we have hypothesized that covalent constraints such as side-chain-to-side-chain lactam rings would stabilize an alpha-helical conformation shown to be important for the recognition and binding of the CRF C-terminus 30 residues, to CRF receptors. These studies led to the discovery of useful CRF antagonists such as alpha-helical CRF (alpha-hel-CRF) and Astressin both in vitro and in vivo. To test the hypothesis that such lactam rings may also be modulating activation of the receptor when introduced at the N-terminus of CRF, we studied the influence of the successive introduction from residues 4 to 14 of a cyclo(i, i+3)[Lysi-Glu(i+3)] and a cyclo(i,i+3)[Glui-Lys(i+3)] bridge on the in vitro potency of the agonist [Ac-Pro4,dPhe12,Nle21,38]hCRF(4-41) and related compounds. We have also introduced the favored cyclo(Glu30-Lys33) substitution found to be remarkable in several families of antagonists (such as Astressin) and in a number of CRF agonists and investigated the role of residues 4-8 on receptor activation using successive deletions. Earlier studies had shown that in both oCRF and alpha-helical CRF, deletion of residues 1-6, 1-7, and 1-8 led to gradual loss of intrinsic activity (IA) (from 50% IA to <10% IA) resulting in alpha-hel-CRF being a potent competitive antagonist. We show that acetylation of the N-terminus of these fragments generally increases potency by a factor of 2-3 with no influence on IA. While cyclo(30-33)[Ac-Leu8,dPhe12,Nle21, Glu30,Lys33,Nle38]hCRF(8-41) (30) is the shortest reported analogue of CRF to be equipotent to CRF (70% IA), the corresponding linear analogue (31) is 120 times less potent (59% IA). Addition of one amino acid at the N-terminus ¿cyclo(30-33)[Ac-Ser7,dPhe12,Nle21, Glu30,Lys33,Nle38]hCRF(7-41) (28)¿ results in a 5-fold increase in agonist potency and full intrinsic activity (113%). The most favored modifications were also introduced in other members of the CRF family including sauvagine (Sau), urotensin (Utn), urocortin (Ucn), and alpha-hel-CRF. Parallel and consistent results were obtained suggesting that the lactam cyclization at residues 29-32 and 30-33 (for the members of the CRF family with 40 and 41 amino acid residues, respectively) will induce (in the shortened agonists) a structural constraint (alpha-helix) that stabilizes a bioactive conformation similar to that shown in the Astressin family of CRF antagonists and that residue 8 (leucine or isoleucine) bears the sole responsibility for activation of the receptor since deletion of that residue leads to potent antagonists (Gulyas et al. Proc. Natl. Acad.Sci. U.S.A. 1995, 92, 10575-10579).
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MESH Headings
- Amino Acid Sequence
- Animals
- Cells, Cultured
- Chromatography, High Pressure Liquid
- Corticotropin-Releasing Hormone/agonists
- Corticotropin-Releasing Hormone/analogs & derivatives
- Corticotropin-Releasing Hormone/chemical synthesis
- Corticotropin-Releasing Hormone/pharmacology
- Electrophoresis, Capillary
- Glutamine/chemistry
- Humans
- Lysine/chemistry
- Mass Spectrometry
- Molecular Sequence Data
- Peptides, Cyclic/chemical synthesis
- Peptides, Cyclic/chemistry
- Peptides, Cyclic/pharmacology
- Pituitary Gland, Anterior/cytology
- Pituitary Gland, Anterior/drug effects
- Pituitary Gland, Anterior/metabolism
- Rats
- Rats, Sprague-Dawley
- Sheep
- Structure-Activity Relationship
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Affiliation(s)
- J Rivier
- The Clayton Foundation Laboratories for Peptide Biology, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, California 92037, USA
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14
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Azay J, Nagain C, Llinares M, Devin C, Fehrentz JA, Bernad N, Roze C, Martinez J. Comparative study of in vitro and in vivo activities of bombesin pseudopeptide analogs modified on the C-terminal dipeptide fragment. Peptides 1998; 19:57-63. [PMID: 9437737 DOI: 10.1016/s0196-9781(97)00275-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Analogs of bombesin in which the peptide bond between the two last amino acid residues were replaced by a pseudopeptide bond mimicking the transition state analog were evaluated. These compounds were able to recognize the bombesin receptor on isolated rat pancreatic acini with high potency (Ki from 0.60 +/- 0.27 nM to 4.3 +/- 2.3 nM). Although they were devoid of agonist activity, they were able to antagonize bombesin-induced amylase secretion in this model, with potencies in accordance with their affinities (IC50 from 1.6 +/- 0.3 nM to 10.0 +/- 1.7 nM). When tested in vivo in the anesthetized rat, these bombesin receptor antagonists exhibited high potency in inhibiting bombesin-induced pancreatic secretion (H-DPhe-Gln-Trp-Ala-Val-Gly-His-NH-CH[CH2-CH(CH3)2]-CHOH-(CH 2)3-CH3, JMV845, was among the most potent compounds with ED50 of 7.82 +/- 2.89 nM in inhibiting bombesin-induced protein secretion). The results of this study showed that replacing the peptide bond between the two last amino acid residues in bombesin by mimicking the transition state analog resulted in in vitro and in vivo potent bombesin receptor antagonists.
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Affiliation(s)
- J Azay
- Laboratoire des Aminoacides, Peptides et Protéines, LAPP UMR CNRS 5810, Universités de Montpellier I et II, Faculté de Pharmacie, France
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