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Volumn 11, Issue 18, 2009, Pages 4128-4131

Reaction of 1,2-orthoesters with HF-pyridine: A method for the preparation of partly unprotected glycosyl fluorides and their use in saccharide synthesis

Author keywords

[No Author keywords available]

Indexed keywords

CARBOHYDRATE; FLUORIDE; HYDROFLUORIC ACID; PYRIDINE DERIVATIVE;

EID: 70349114277     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol901630d     Document Type: Article
Times cited : (17)

References (69)
  • 43
    • 84961328464 scopus 로고    scopus 로고
    • Ernst, B., Hart, G. W., Sinaÿ, P., Eds.; Wiley-VCH: Weinheim
    • Oscarson, S. Carbohydrates in Chemistry and Biology; Ernst, B., Hart, G. W., Sinaÿ, P., Eds.; Wiley-VCH: Weinheim, 2000; Vol.1, pp 93-116.
    • (2000) Carbohydrates in Chemistry and Biology , vol.1 , pp. 93-116
    • Oscarson, S.1
  • 49
    • 0002451998 scopus 로고
    • The HF-pyridine complex has been used as a source of fluoride in the preparation of glycosyl fluorides:(a)
    • The HF-pyridine complex has been used as a source of fluoride in the preparation of glycosyl fluorides :(a) Hayashi, M.; Hashimoto, S.; Noyori, R. Chem. Lett. 1984, 1747-1750.
    • (1984) Chem. Lett. , pp. 1747-1750
    • Hayashi, M.1    Hashimoto, S.2    Noyori, R.3
  • 54
    • 11944252943 scopus 로고
    • left compound 3a unchanged.
    • 3NHF, less acidic than HF-pyridine but yet a good source of fluoride ion ( McClinton, M. A. Aldrichim. Acta 1995, 28, 31-35), left compound 3a unchanged.
    • (1995) Aldrichim. Acta , vol.28 , pp. 31-35
    • McClinton, M.A.1
  • 55
    • 70349129183 scopus 로고    scopus 로고
    • Reaction at -378°C (HF-py, 20 equiv) was sluggish, leaving considerable amounts of unreacted 1,2-orthoester among other compounds, in a complex reaction mixture.
    • Reaction at -378°C (HF-py, 20 equiv) was sluggish, leaving considerable amounts of unreacted 1,2-orthoester among other compounds, in a complex reaction mixture.
  • 56
    • 0033609925 scopus 로고    scopus 로고
    • Neither 1,6-anhydro derivative formation or 1,2,6 internal orthoester formation were observed:Hiranuma
    • Neither 1,6-anhydro derivative formation or 1,2,6 internal orthoester formation were observed:Hiranuma, S.; Kanie, O.; Wong, C.-H. Tetrahedron Lett. 1999, 40, 6423-6426.
    • (1999) Tetrahedron Lett. , vol.40 , pp. 6423-6426
    • Hiranuma, S.1    Kanie, O.2    Wong, C.-H.3
  • 63
    • 70349089376 scopus 로고    scopus 로고
    • A minor saccharide (3-5%) was also detected although its structure remains, at this time, uncertain.
    • A minor saccharide (3-5%) was also detected although its structure remains, at this time, uncertain.
  • 69
    • 70349108056 scopus 로고    scopus 로고
    • 1,2-Orthoesters are normally prepared from fully acylated derivates, thus removal of the protecting groups prior to fluoride formation have the advantage of preserving the 2-O-acyl substituent as a masked, base stable substituent.
    • 1,2-Orthoesters are normally prepared from fully acylated derivates, thus removal of the protecting groups prior to fluoride formation have the advantage of preserving the 2-O-acyl substituent as a masked, base stable substituent.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.