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Volumn 126, Issue 27, 2004, Pages 8356-8357

A surprising dipolar cycloaddition provides ready access to aminoglycosides

Author keywords

[No Author keywords available]

Indexed keywords

AMINOGLYCOSIDE; AZIRIDINE DERIVATIVE; CARBOHYDRATE; NITROGEN; TRIAZOLINE DERIVATIVE;

EID: 3142738147     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0319238     Document Type: Article
Times cited : (73)

References (43)
  • 1
    • 0004106191 scopus 로고    scopus 로고
    • Varki, A., Cummings, R., Esko, J., Freeze, H., Hart, G., Marth, J., Eds.; Cold Spring Harbor Laboratory Press: Cold Spring Harbor, NY
    • (a) Essentials of Glycobiology; Varki, A., Cummings, R., Esko, J., Freeze, H., Hart, G., Marth, J., Eds.; Cold Spring Harbor Laboratory Press: Cold Spring Harbor, NY, 1999.
    • (1999) Essentials of Glycobiology
  • 7
    • 0000198772 scopus 로고
    • For reviews of aminoglycoside synthesis and associated protecting group manipulations, see: (a) Banoub, J.; Boullanger, P.; LaFont, D. Chem. Rev. 1992, 92, 1167.
    • (1992) Chem. Rev. , vol.92 , pp. 1167
    • Banoub, J.1    Boullanger, P.2    LaFont, D.3
  • 16
    • 33845184508 scopus 로고
    • Nucleophilic ring opening of such bicyclic aziridines has clear precedent in the ring opening of the analogous epoxides. See: Halcomb, R. L.; Danishefsky, S. J. J. Am. Chem. Soc. 1989, 111, 6661.
    • (1989) J. Am. Chem. Soc. , vol.111 , pp. 6661
    • Halcomb, R.L.1    Danishefsky, S.J.2
  • 28
    • 0030311279 scopus 로고    scopus 로고
    • For a review of triazolines as aziridine equivalents, see: Semenov, V. P. Russ. J. Org. Chem. 1996, 32, 1576 (Zh. Org. Khim. 1996, 32, 1627).
    • (1996) Russ. J. Org. Chem. , vol.32 , pp. 1576
    • Semenov, V.P.1
  • 29
    • 0030311279 scopus 로고    scopus 로고
    • For a review of triazolines as aziridine equivalents, see: Semenov, V. P. Russ. J. Org. Chem. 1996, 32, 1576 (Zh. Org. Khim. 1996, 32, 1627).
    • (1996) Zh. Org. Khim. , vol.32 , pp. 1627
  • 32
    • 3142684335 scopus 로고    scopus 로고
    • note
    • While we have encountered no problems in this respect, CAUTION should always be used when heating solutions of azides.
  • 33
    • 3142719552 scopus 로고    scopus 로고
    • note
    • We believe the acid- and base-lability of the triazoline lead to the requirement for trialkyl orthoformate as a non-basic acid-scavenging solvent.
  • 34
    • 0000990695 scopus 로고
    • For early examples of the photochemical generation of aziridines from triazolines, see: (a) Scheiner, P. J. Org. Chem. 1967, 32, 2022.
    • (1967) J. Org. Chem. , vol.32 , pp. 2022
    • Scheiner, P.1
  • 37
    • 3142665271 scopus 로고    scopus 로고
    • note
    • The solvent specificity and requirement for a quartz reaction vessel are evidence that acetone serves both as solvent and triplet sensitizer for aziridine formation. For a previous example of sensitized photochemical conversion of a triazoline to an aziridine, see ref 12b.
  • 38
    • 3142700508 scopus 로고    scopus 로고
    • note
    • 1H NMR spectra.
  • 39
    • 3142756236 scopus 로고    scopus 로고
    • note
    • C2 configurations were assigned based on X-ray crystallographic analysis of 4b. The C1 configuration was assigned based on 1H coupling constants.
  • 40
    • 0037151613 scopus 로고    scopus 로고
    • Formation of the acetone adduct could also proceed through O-alkylation of acetone followed by rearrangement. We thank Prof. C. Rojas (Barnard College) for bringing this possibility to our attention. See: Zhang, Y.; Reynolds, N. T.; Manju, K.; Rovis, T. J. Am. Chem. Soc. 2002, 124, 9720.
    • (2002) J. Am. Chem. Soc. , vol.124 , pp. 9720
    • Zhang, Y.1    Reynolds, N.T.2    Manju, K.3    Rovis, T.4
  • 43
    • 3142703428 scopus 로고    scopus 로고
    • note
    • Loss of the TBS group during the cycloaddition accounts for the majority of material loss. Optimization is currently under way in the context of identifying an appropriate silyl linker for solid-phase synthesis.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.