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Volumn 127, Issue 20, 2005, Pages 7359-7369

Aziridine-2-carboxylic acid-containing peptides: Application to solution- and solid-phase convergent site-selective peptide modification

Author keywords

[No Author keywords available]

Indexed keywords

AMINES; AMINO ACIDS; CARBOXYLIC ACIDS; CHEMICAL MODIFICATION; SYNTHESIS (CHEMICAL);

EID: 19744362073     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja050304r     Document Type: Article
Times cited : (80)

References (89)
  • 5
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    • (a) Seitz, O. ChemBioChem. 2000, 1, 214-246.
    • (2000) ChemBioChem , vol.1 , pp. 214-246
    • Seitz, O.1
  • 19
    • 0036462604 scopus 로고    scopus 로고
    • (e) Davis, B. G. Chem. Rev. 2002, 102, 579-602.
    • (2002) Chem. Rev. , vol.102 , pp. 579-602
    • Davis, B.G.1
  • 36
    • 1542375289 scopus 로고    scopus 로고
    • (c) Hu, X. E. Tetrahedron 2004, 60, 2701-2743.
    • (2004) Tetrahedron , vol.60 , pp. 2701-2743
    • Hu, X.E.1
  • 37
    • 19744372047 scopus 로고    scopus 로고
    • note
    • Full description of each abbreviated term is given in the Supporting Information.
  • 50
    • 19744374775 scopus 로고    scopus 로고
    • note
    • 2 amino acid adduct was obtained as a single diastereomer, which is presumably formed via inventive displacement at the aziridine α-carbon.
  • 53
    • 19744376572 scopus 로고    scopus 로고
    • note
    • The major product remained unchanged after resubjection to the reaction conditions.
  • 58
    • 19744378495 scopus 로고    scopus 로고
    • note
    • Low conversion to the desired product was observed after prolonged reaction time when 0.1 equiv of DBU was used in this reaction.
  • 59
    • 19744376255 scopus 로고    scopus 로고
    • note
    • A similar mode of reactivity of acylated aziridines was previously observed by Okawa in the reaction of acylated Azy-containing peptides with primary amines (ref 12a).
  • 65
    • 0024376173 scopus 로고
    • (b) Bos, J. L. Cancer Res. 1989, 49, 4682-4689.
    • (1989) Cancer Res. , vol.49 , pp. 4682-4689
    • Bos, J.L.1
  • 66
    • 19744379652 scopus 로고    scopus 로고
    • note
    • Reactions in entries 8-10 were carried out by heating the reaction mixture to 60 °C to allow for faster reaction. A decrease in the yields of the isolated products in these reactions may be attributed to the thermal instability of the 2-chlorotrityl linker.
  • 72
    • 19744377232 scopus 로고    scopus 로고
    • note
    • In these reactions, the ratio of products was determined by NMR analysis of the crude product mixture. In instances when the analysis of crude NMR data did not allow an accurate estimate of this ratio, products were analyzed by HPLC-ESI.
  • 73
    • 19744374961 scopus 로고    scopus 로고
    • note
    • 1Bu)AlaGly pentapeptide was swelled in DMF containing 20% DMSO (v/v) and then reacted with EtSH and DBU, the same product distribution was observed.
  • 74
    • 19744369747 scopus 로고    scopus 로고
    • note
    • A similar distribution of products was observed in the reaction of these two coupling partners in 10% DMSO in DMF (v/v) and in the presence of 2 M ethylenecarbonate in DMF.
  • 75
    • 19744364150 scopus 로고    scopus 로고
    • note
    • A substantial decrease in the ligation rate for the peptides possessing N-alkyl amino acids in the [Azy-2] position was observed for all of the tested peptides.
  • 76
    • 19744364564 scopus 로고    scopus 로고
    • note
    • While the expected glycosylated cysteine adduct was the major component of the crude mixture, two other minor carbohydrate-containing products were observed after cleavage from the solid support. Upon removal of O-acetates with sodium methoxide in methanol. a C3:C2 adduct ratio of 3.7:1.0 was obtained (HPLC-ESI).
  • 82
    • 19744374654 scopus 로고    scopus 로고
    • note
    • Peptides 51 and 52 were prepared starting from glycine-preloaded 2-chlorotrityl polystyrene resin 21 with a loading of 0.78 mmol/g.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.