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Avenoza A, Busto JH, Cativiela C, Peregrina JM, Rodríguez F. Resolution of (1R,2R)- and (1S,2S)-cyclic constrained phenylalanine analogues (c6Phe). Conformations of (1R,2R)- and (1S,2S)-c6Phe containing peptides. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00692-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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53
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Mazaleyrat JP, Boutboul A, Lebars Y, Gaucher A, Wakselman M. Practical resolution of an atropoisomeric α,α-disubstituted glycine with l-phenylalanine cyclohexylamide as chiral auxiliary. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0957-4166(98)00253-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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54
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Frutos RP, Spero DM. Synthesis of protected, chiral α,α-disubstituted α-amino acids via a Beckmann rearrangement. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00309-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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55
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Empirical rules for the enantiopreference of lipase from Aspergillus niger toward secondary alcohols and carboxylic acids, especially α-amino acids. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0957-4166(97)00524-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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56
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Obrecht D, Altorfer M, Bohdal U, Daly J, Huber W, Labhardt A, Lehmann C, Müller K, Ruffieux R, Schönholzer P, Spiegler C, Zumbrunn C. Design and synthesis of novel nonpolar host peptides for the determination of the 310- and α-helix compatibilities of α-amino acid buildig blocks: An assessment of α,α-disubstituted glycines. Biopolymers 1997. [DOI: 10.1002/(sici)1097-0282(19971015)42:5<575::aid-bip7>3.0.co;2-n] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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57
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Ndzié E, Cardinael P, Schoofs AR, Coquerel G. An efficient access to the enantiomers of α-methyl-4-carboxyphenylglycine via a hydantoin route using a practical variant of preferential crysallization AS3PC (Auto Seeded Programmed Polythermic Preferential Crystallization)11. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0957-4166(97)00349-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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58
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Resolution of racemic carboxylic acid derivatives by Ti-TADDOLate mediated esterification reactions—A general method for the preparation of enantiopure compounds. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00456-0] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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59
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Synthesis of conformationally restricted serine derivatives through ruthenium(II)-catalyzed ring closing metathesis. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00252-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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60
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Tóth G, Darula Z, Péter A, Fülöp F, Tourwé D, Jaspers H, Verheyden P, Böcskey Z, Tóth Z, Borsodi A. Conformationally constrained deltorphin analogs with 2-aminotetralin-2-carboxylic acid in position 3. J Med Chem 1997; 40:990-5. [PMID: 9083489 DOI: 10.1021/jm9602726] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Two approaches to the design of very active and highly selective delta opioid peptides were used to obtain new deltorpin analogs with altered hydrophobic and stereoelectronic properties. Deltorphin I and II analogs were synthesized involving the substitution of Ile instead of Val at positions 5 and 6 in the address domain and 2-aminotetralin-2-carboxylic acid (Atc) instead of Phe in the message domain. The peptides were agonists in the subnanomolar range in the MVD assay and in the micromolar or higher range in the GPI assay, showing a very high selectivity for delta receptors. A very similar trend could be observed in radioreceptor binding assays in which selective tritiated opioid ligands were used. (R)- and (S)-Atc-deltoriphins exhibited similar Ki values in the binding assay, with almost complete loss of the stereospecificity of the binding. Conformational studies provided evidence for the little disturbance of the backbone conformational equilibrium when Phe3 is replaced by (S)- or (R)-Atc. The use of the Atc constraint gives additional evidence that, during its interaction with the delta receptor, the side chain of residue 3 adopts the trans conformation at chi 1.
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Affiliation(s)
- G Tóth
- Isotope Laboratory and Institute of Biochemistry, Hungarian Academy of Sciences, Szeged, Hungary
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61
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Seebach D, Sting AR, Hoffmann M. Die Selbstregeneration von Stereozentren (SRS) — Anwendungen, Grenzen und Preisgabe eines Syntheseprinzips. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961082304] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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62
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Obrecht D, Altorfer M, Lehmann C, Schönholzer P, Müller K. An Efficient Strategy to Orthogonally Protected (R)- and (S)-alpha-Methyl(alkyl)serine-Containing Peptides via a Novel Azlactone/Oxazoline Interconversion Reaction. J Org Chem 1996; 61:4080-4086. [PMID: 11667286 DOI: 10.1021/jo952068g] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel strategy for the synthesis of (R)- and (S)-alpha-methyl(alkyl)serine-containing peptides is presented. Using (S)-phenylalanine cyclohexylamide 6 as chiral auxiliary, the optically pure azlactones (R)- and (S)-2 were synthesized via a novel azlactone/oxazoline interconversion reaction (Figures 3 and 6). These azlactones constitute fully protected and activated synthetic equivalents of (R)- and (S)-alpha-methylserine and can be directly incorporated into peptides without further protective group manipulations. Like other alpha,alpha-dialkylated glycines, optically pure alpha-alkylserines can be used to stabilize beta-turn and alpha-helical conformations in short peptides.
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Affiliation(s)
- Daniel Obrecht
- Pharma Research, F. Hoffmann-La Roche AG, CH-4070 Basel, Switzerland
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63
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A new chiral α-aminoacid with only axial dissymmetry: Synthesis and X-ray analysis of a 1,1′-binaphthyl-substituted α-aminoisobutyric acid (Bin) and of its biphenyl analogue (Bip). Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)00502-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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64
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Imogaï H, Petit Y, Larchevêque M. Stereocontrolled synthesis of α,α-disubstituted α-aminoaldehydes and α-aminoacids using a [3,3] allylic trichloracetimidate rearrangement. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)00393-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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65
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Andrews MD, Brewster AG, Moloney MG, Owen KL. Convenient synthesis of enantiopure cyclic α-hydroxyalkyl α-amino esters. ACTA ACUST UNITED AC 1996. [DOI: 10.1039/p19960000227] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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66
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A novel synthesis of (R)- and (S)-α-alkylated aspartic and glutamic acids: α-alkylated aspartic succinimides as new type of β-turn type II and II′ mimetics. Tetrahedron 1995. [DOI: 10.1016/0040-4020(95)00665-u] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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67
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El Tayar N, Karajiannis H, van de Waterbeemd H. Structure-lipophilicity relationships of peptides and peptidomimetics. Amino Acids 1995; 8:125-39. [DOI: 10.1007/bf00806487] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/1994] [Accepted: 02/23/1994] [Indexed: 11/28/2022]
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68
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Studer A, Seebach D. Enantioselective synthesis of α-branched α-amino acids with bulky substituents. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.199519950231] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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69
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Liu W, Ray P, Benezra SA. Chemo–enzymic synthesis of optically active α,α-disubstituted α-amino acids. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/p19950000553] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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70
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71
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Resolution and regioselective protection of glutamic acid analogues. I- resolution of diastereomeric α-boroxazolidone derivatives. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0957-4166(94)80036-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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72
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73
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Palomo C, Aizpurua JM, Galarza R, Iturburu M, Legido M. The cycloaddition of monoalkylketenes to 2-oxoalkanoic ester-derived imines: a concise stereoselective approach to α,β-disubstituted asparates and 3,4-dialkylsubstituted β-lactams. Bioorg Med Chem Lett 1993. [DOI: 10.1016/s0960-894x(01)80978-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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74
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Control of the enantiomeric purity and correlation with the absolute configuration of N-protected 2-cyanoglycinates. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/s0957-4166(00)80429-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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