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Volumn 46, Issue 3, 2005, Pages 401-405

The Overman rearrangement in carbohydrate chemistry: Stereoselective synthesis of functionalized 3-amino-3,6-dihydro-2H-pyrans and incorporation in peptide derivatives

Author keywords

Amino sugar; Calpain inhibitor; Enkephalin; Overman rearrangement; Peptidomimetic

Indexed keywords

AZIDE; CALPASTATIN; PEPTIDE DERIVATIVE; PYRAN DERIVATIVE; SUGAR;

EID: 11144337733     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2004.11.109     Document Type: Article
Times cited : (24)

References (41)
  • 19
    • 33845560283 scopus 로고
    • Inversion of an amide bond in a peptide chain is one of the earliest amide modifications introduced in peptides in order to improve their pharmacological properties, see: M. Goodman, and M. Chorev Acc. Chem. Res. 12 1979 1 7
    • (1979) Acc. Chem. Res. , vol.12 , pp. 1-7
    • Goodman, M.1    Chorev, M.2
  • 21
    • 11144271321 scopus 로고    scopus 로고
    • note
    • 13C NMR, IR, MS) data (for compounds 11 and 12, see Ref. 17)
  • 25
    • 0037981212 scopus 로고    scopus 로고
    • note
    • Interestingly, when trichloroacetimidate 4 was subjected without any purification to the Overman rearrangement conditions, the allylic chloride 13 was isolated as sole product in 50% yield instead of the expected trichloroacetamide 4. Remarkably, the reaction took place in a total stereoselective way, affording exclusively the 3β-chloro diastereoisomer; its configuration was firmly established on the basis of NOESY experiments and the X-ray crystal structure of a p-nitrobenzoyl derivative. As other allylic chlorides [Jeganmohan, M.; Shanmugasundaram, M.; Cheng, C. Org. Lett. 2003, 5, 881-884], compound 13 can be a valuable synthetic intermediate. In addition, this compound has proved useful for the synthesis of halogenated sugars and peptide-carbohydrate hybrids, [Montero, A.; Benito, E.; Herradón, B., in preparation]
  • 35
    • 11144332864 scopus 로고    scopus 로고
    • note
    • 3
  • 40
    • 11144292629 scopus 로고    scopus 로고
    • note
    • The analytical and spectroscopic data for 11 and 12 are indicated below. To identify the signal assignations (that have been done by a combination of mono- and bi-dimensional NMR experiments), we have numbered the atoms in the following manner: unprimed number refer to the pyrane ring and the dipeptide fragment (including the side chains of the amino acids), starting from the pyranosidic oxygen; the primed number (′) indicate the carbon and hydrogen atoms in the allyloxy fragment; and the double-primed (″) numbers denote atoms in the tyrosine derivative fragment (including the side chain).
  • 41
    • 11144281751 scopus 로고    scopus 로고
    • note
    • Other peptide-scaffold hybrids (with other scaffolds than carbohydrate) with sequence similarities to enkephalins are also calpain inhibitors (Montero, A. Ph.D. thesis, Autónoma University, Madrid, July 2004)


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.