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Volumn , Issue 5, 2003, Pages 671-674

Straightforward synthesis of N-hydroxy peptides

Author keywords

Hydroxylamines; N O acylation; N hydroxy peptides; Oximes; Reduction

Indexed keywords

AMINO ACID; HYDROXYL GROUP; OXIME; PEPTIDE DERIVATIVE;

EID: 0037263901     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2003-38347     Document Type: Article
Times cited : (13)

References (35)
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    • Selected examples: (a) Akiyama, M.; Katoh, A.; Mutsui, Y.; Watanabe, Y.; Umemoto, K. Chem. Lett. 1996, 915. (b) Hara, Y.; Akiyama, M. J. Am. Chem. Soc. 2001, 123, 7247.
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    • Formation of the N-benzyloxy amide link is very sensitive to steric hindrance and generally requires strong acylating systems such as HATU {N-[(dimethylamino)-1H-1,2,3-triazolo[4,5-b]pyridin-1-ylmethylene]-N- methylmethanaminium hexafluorophosphate} see: (a) Akiyama, M.; Iesaki, K.; Katoh, A.; Shimizu, K. J. Chem. Soc., Perkin Trans. 1 1986, 851. (b) Bianco, A.; Zabel, C.; Walden, P.; Jung, G. J. Peptide Sci. 1998, 4, 471.
    • (1986) J. Chem. Soc., Perkin Trans. 1 , pp. 851
    • Akiyama, M.1    Iesaki, K.2    Katoh, A.3    Shimizu, K.4
  • 13
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    • Formation of the N-benzyloxy amide link is very sensitive to steric hindrance and generally requires strong acylating systems such as HATU {N-[(dimethylamino)-1H-1,2,3-triazolo[4,5-b]pyridin-1-ylmethylene]-N- methylmethanaminium hexafluorophosphate} see: (a) Akiyama, M.; Iesaki, K.; Katoh, A.; Shimizu, K. J. Chem. Soc., Perkin Trans. 1 1986, 851. (b) Bianco, A.; Zabel, C.; Walden, P.; Jung, G. J. Peptide Sci. 1998, 4, 471.
    • (1998) J. Peptide Sci. , vol.4 , pp. 471
    • Bianco, A.1    Zabel, C.2    Walden, P.3    Jung, G.4
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    • (a) Nucleophilic substitution on α-bromo acid: Kolasa, T.; Chimiak, A. Tetrahedron 1974, 30, 3591.
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  • 22
    • 0013117186 scopus 로고    scopus 로고
    • note
    • The two oxime isomers are separated by liquid chromatography. No difference in diastereoselectivity was observed in their reduction so that they were used as a mixture.
  • 24
    • 0013116794 scopus 로고    scopus 로고
    • note
    • Reduction of 2h with sodium cyanoborohydride was also inefficient.
  • 25
    • 0013071675 scopus 로고    scopus 로고
    • note
    • -1): 3323 (m), 3254 (w), 2977 (m), 1738 (s), 1663 (s), 1541 (s).
  • 26
    • 85087537676 scopus 로고    scopus 로고
    • note
    • 1H NMR) and 3.69 mmol of the second diastereomer.
  • 27
    • 0013072154 scopus 로고    scopus 로고
    • See ref. 1 and references therein
    • See ref. 1 and references therein.
  • 28
    • 0013168785 scopus 로고    scopus 로고
    • note
    • -1 ): 3316 (s br), 2964 (m), 1734 (s), 1701 (s), 1641 (s), 1533 (s), 1450 (s).
  • 29
    • 85087536880 scopus 로고    scopus 로고
    • note
    • 3)-NH-O(CO)-].
  • 30
    • 0013074203 scopus 로고    scopus 로고
    • note
    • Abbreviations: DCC, dicyclohexylcarbodiimide; HOBt, 1-hydroxybenzotriazole; EDCI, 1-ethyl-3-(3′-dimethylaminopropyl)carbodiimide; BOP, benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate; DMTMM, 4-(4, 6-dimethoxy[1,3,5]triazin-2-yl)-4-methyl-morpholinium chloride.
  • 33
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    • (a) Reaction of N-alkyl hydroxylamine with mixed anhydrides of amino acids: Nakonieczna, L.; Chimiak, A. Synthesis 1987, 418.
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  • 34
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    • (b) Acylation of optically active N-hydroxy Leucine methyl ester with simple acyl chlorides: Jin, Y.; Kim, D. H. Tetrahedron: Asymmetry 1997, 8, 3699.
    • (1997) Tetrahedron: Asymmetry , vol.8 , pp. 3699
    • Jin, Y.1    Kim, D.H.2
  • 35
    • 85087539249 scopus 로고    scopus 로고
    • note
    • 3 in a NMR tube with 3 equiv of pyridine indicates that with 0.7 equiv of TMSCl two exchanging products are first visible. After the addition of an excess TMSCl (up to 2.2 equiv), only one product remains. This is in agreement with previous findings (see ref. 20a).


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