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Volumn 11, Issue 15, 2005, Pages 4465-4472

On the regio- and stereoselective synthesis of aminocyclitols from cyclitol epoxides: The effect of Li as a chelating agent

Author keywords

Ab initio calculations; Amino alcohols; Conformation analysis; Epoxides; Regioselectivity

Indexed keywords

ALCOHOLS; CHELATION; CHROMATOGRAPHY; FILTRATION; LITHIUM COMPOUNDS; MATHEMATICAL MODELS; MODULATORS; NITROGEN; NUCLEAR MAGNETIC RESONANCE; SILICA GEL; SODIUM COMPOUNDS; SYNTHESIS (CHEMICAL);

EID: 22944475824     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/chem.200401270     Document Type: Article
Times cited : (13)

References (43)
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    • 3 of related O-protected cyclophellitol derivatives, see: a) K. Tatsuta, S. Miura, Tetrahedron Lett. 1995, 36, 6721-6724;
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    • Tatsuta, K.1    Miura, S.2
  • 9
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    • b) S. Ogawa, N. Chida, T. Suami, J. Org. Chem. 1983, 48, 1203-1207; for reactions of cyclitol epoxides with amines, see;
    • (1983) J. Org. Chem. , vol.48 , pp. 1203-1207
    • Ogawa, S.1    Chida, N.2    Suami, T.3
  • 21
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    • Experiments at RT failed to afford the opening adducts
    • Experiments at RT failed to afford the opening adducts
  • 22
    • 22944481400 scopus 로고    scopus 로고
    • note
    • In all cases, the regio- and the stereochemistry of the major adducts was confirmed from selected H-H coupling constants from azidoalcohols 3a and 4a. Moreover, in the case of 3a, symmetry considerations imposed by the meso nature of the azidoalcohol arising from trans-diaxial Cl opening of epoxide 1 were conclusive.
  • 23
    • 22944489459 scopus 로고    scopus 로고
    • note
    • 4 led to precipitation.
  • 24
    • 22944443171 scopus 로고    scopus 로고
    • note
    • 1H NMR pattern of the cyclohexane moiety, since dihedral angles should be significantly different for both limit conformations (A1 and E1). Thus, high J values would be indicative of any of the "all-equatorial" conformations, whereas small J values would be expected for the "all-axial" one.
  • 31
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    • note
    • 4 solution. On the other side, the above experimental requirements would be consistent with the participation of three Li ions that could chelate the "all-equatorial" conformer. This possibility was taken into account and despite the corresponding transition states for the C1 and C2 attack have been found, we could not obtain the optimised geometries for the corresponding pre-reactive complexes. However, form an energetic standpoint, the transition state describing the C1 attack also lie below in energy than that corresponding to the C2 attack, in agreement with the experimental findings.
  • 39
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    • note
    • Experimental conditions require heating at 80°C to revert the preferred coordination of Li ion with acetonitrile. (see ref. [19]).
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    • M. J. Frisch, G.W. Trucks, H.B. Schlegel, G.E. Scuseria, M. A. Robb, J. R. Cheeseman, V. G. Zakrzewsk, J. J. A. Montgomery, R. E. Stratmann, J. C. Buran, S. Dapprich, J. M. Millam, A. D. Daniels, K. N. Kudin, M. C. Strain, O. Farkas, J. Tomasi, V. Barone, M. Cossi, R. Cammi, B. Mennucci, C. Pomelli, C. Adamo, S. Clifford, J. Ochterski, G. A. Petersson, P. Y. Ayala, Q. Cui, K. Morokuma, N. Rega, P. Salvador, J. J. Dannenberg, D. K. Malick, A. D. Rabuck, K. Raghavachari, J. B. Foresman, J. Cioslowski, V. Ortiz, A. G. Baboul, B. B. Stefanov, A. L. G. Liu, P. Piskorz, I. Komaromi, R. G. L. Martin, D. J. Fox, T. Keith, M. A. Al-Laham, C. Y. Peng, A. Nanayakkara, M. Challacombe, P. M. W. Gill, B. Johnson, M. W. W. W. Chen, J. L. Andres, C. Gonzalez, M. Head-Gordon, E. S. Replogle, J. A. Pople, Gaussian, Inc., Pittsburgh PA, 2002
    • M. J. Frisch, G.W. Trucks, H.B. Schlegel, G.E. Scuseria, M. A. Robb, J. R. Cheeseman, V. G. Zakrzewsk, J. J. A. Montgomery, R. E. Stratmann, J. C. Buran, S. Dapprich, J. M. Millam, A. D. Daniels, K. N. Kudin, M. C. Strain, O. Farkas, J. Tomasi, V. Barone, M. Cossi, R. Cammi, B. Mennucci, C. Pomelli, C. Adamo, S. Clifford, J. Ochterski, G. A. Petersson, P. Y. Ayala, Q. Cui, K. Morokuma, N. Rega, P. Salvador, J. J. Dannenberg, D. K. Malick, A. D. Rabuck, K. Raghavachari, J. B. Foresman, J. Cioslowski, V. Ortiz, A. G. Baboul, B. B. Stefanov, A. L. G. Liu, P. Piskorz, I. Komaromi, R. G. L. Martin, D. J. Fox, T. Keith, M. A. Al-Laham, C. Y. Peng, A. Nanayakkara, M. Challacombe, P. M. W. Gill, B. Johnson, M. W. W. W. Chen, J. L. Andres, C. Gonzalez, M. Head-Gordon, E. S. Replogle, J. A. Pople, Gaussian, Inc., Pittsburgh PA, 2002.
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  • 43
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.