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Volumn 76, Issue 21, 2011, Pages 8588-8598

Total synthesis of α-1 C-galactosylceramide, an immunostimulatory C-glycosphingolipid, and confirmation of the stereochemistry in the first-generation synthesis

Author keywords

[No Author keywords available]

Indexed keywords

ASYMMETRIC EPOXIDATION; CYTOKINES; IN-VITRO; INVERSION OF CONFIGURATION; NATURAL KILLER CELLS; OLEFIN CROSS-METATHESIS; PHYTOSPHINGOSINES; SYNTHETIC ROUTES; TOTAL SYNTHESIS;

EID: 80055100954     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo201450s     Document Type: Article
Times cited : (25)

References (39)
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    • As shown in Scheme S1 of the Supporting Information, we tried to improve the diastereoisomeric purity of (S)-allylic propargylic alcohol (35a) by employing asymmetric alkynylation, but only moderate diastereoselectivity was obtained. For asymmetric alkynylation, see: Trost, B. M.; Weiss, A. H.; von Wangelin, A. J. J. Am. Chem. Soc. 2006, 128, 8
    • (2006) J. Am. Chem. Soc. , vol.128 , pp. 8
    • Trost, B.M.1    Weiss, A.H.2    Von Wangelin, A.J.3
  • 12
    • 0038475226 scopus 로고    scopus 로고
    • 13C NMR chemical shift of the acetal carbon, (1) this evidence only supports the generation of a vicinal diol instead of a 2,4-diol. However, it cannot indicate if a Payne rearrangement is involved in the opening process. The fact that 5 underwent an intramolecular click reaction to form 6 on extended reaction times confirms that 5 is a 3,4-diol and not a 2,3-diol and thus excludes the occurrence of a Payne rearrangement. For a review of the Payne rearrangement, see: Hanson, R. Org. React. 2002, 60, 1
    • (2002) Org. React. , vol.60 , pp. 1
    • Hanson, R.1
  • 14
    • 34948832038 scopus 로고    scopus 로고
    • 2 gave conjugated aldehyde 36 in 35%. Its formation may arise via a Ti(IV)-catalyzed semi-pinacol rearrangement of α-hydroxy epoxides. For a review of the semi-pinacol rearrangement of α-hydroxy epoxides, see: Snape, T. J. Chem. Soc. Rev. 2007, 36, 1823
    • (2007) Chem. Soc. Rev. , vol.36 , pp. 1823
    • Snape, T.J.1
  • 33
    • 0002649043 scopus 로고
    • Determination of Configuration by NMR Spectroscopy
    • Kagan, H. B. Georg Thieme: Stuggart
    • Gaudemer, A. Determination of Configuration by NMR Spectroscopy. In Stereochemistry, Fundamentals and Methods; Kagan, H. B., Ed.; Georg Thieme: Stuggart, 1977; Vol. 1, pp 44-136.
    • (1977) Stereochemistry, Fundamentals and Methods , vol.1 , pp. 44-136
    • Gaudemer, A.1
  • 37
    • 0000905017 scopus 로고
    • When two protons, B and C, are close in space, and a third proton, A, is close to B but distant from C, a cross-peak can be observed between A and C that could be mistakenly interpreted as a direct NOE connectivity between A and C. See
    • When two protons, B and C, are close in space, and a third proton, A, is close to B but distant from C, a cross-peak can be observed between A and C that could be mistakenly interpreted as a direct NOE connectivity between A and C. See: Bax, A.; Sklenar, V.; Summers, M. F. J. Magn. Reson. 1986, 70, 327
    • (1986) J. Magn. Reson. , vol.70 , pp. 327
    • Bax, A.1    Sklenar, V.2    Summers, M.F.3
  • 38
    • 77954110478 scopus 로고    scopus 로고
    • 13C NMR spectra, specific rotation, and melting point of d - ribo -phytosphingosine tetraacetate obtained from 24 matched the previously reported data. See
    • 13C NMR spectra, specific rotation, and melting point of d-ribo -phytosphingosine tetraacetate obtained from 24 matched the previously reported data. See: Liu, Z.; Byun, H.-S.; Bittman, R. J. Org. Chem. 2010, 75, 4356
    • (2010) J. Org. Chem. , vol.75 , pp. 4356
    • Liu, Z.1    Byun, H.-S.2    Bittman, R.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.