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Volumn 73, Issue 15, 2008, Pages 5723-5731

Calculated chemical shifts as a fine tool of conformational analysis: An unambiguous solution for haouamine alkaloids

Author keywords

[No Author keywords available]

Indexed keywords

ACETONE; ARSENIC COMPOUNDS; CHEMICAL REACTIONS; CHEMICAL SHIFT; FOOD PROCESSING; MODEL STRUCTURES; MOLECULAR MECHANICS; NUCLEAR MAGNETIC RESONANCE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; REGRESSION ANALYSIS; SPEED;

EID: 48249147835     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo702766x     Document Type: Article
Times cited : (31)

References (59)
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    • In the original text: .isomer I could have a stereochemistry as represented in Figure. This accurate NMR study1 reasonably doesn't claim that the obtained ROESY correlations indicate a sole geometry of the tetrahydropyridine ring of M1 in solution. Indeed, these experimental NOE-based data are compatible with a 1Sf and Sf1 sofa as well as a 1H6 half-chair conformation see Supporting Information
    • 6 half-chair conformation (see Supporting Information).
  • 4
    • 48249116259 scopus 로고    scopus 로고
    • Concerning rotation, it is discussed1 as atropoisomerism of the 3-aza-[7]-paracyclophane system. This description of rotation may be interpreted only as rotation of ring B. Geometries, which result from the proposed rotation or N-inversion in C1, are not specified in ref 1. The only source of structures C3 or C2/C4 are the present calculations. On the other hand, formally, these structures may be obtained via rotation of ring B or N-inversion. respectively (Figure 2; see Figure 3 for similar structures, No other conformers, which could appear as a result of these intramolecular motions, e.g, additional ring B rotamers, have been located (this work, Thus, conformers C2, C3, C4, etc. correspond to general structures implied in ref 1. In fact, rotation of ring B is clerically hindered see Supporting Information for details, However, consideration of interconversions C1, C3, C5, C7, etc. cannot be withdrawn. For instance, add
    • f in Figures 2 and 3 means formal rotation of phenolic ring B.
  • 7
    • 5844223038 scopus 로고
    • Lambert, J. B, Takeuchi, E, Eds, VCH Publishers: New York
    • (a) Jennings, W. B.; Boyd, D. R. In Cyclic Organonitrogen Stereodynamics; Lambert, J. B., ; Takeuchi, E., Eds.; VCH Publishers: New York, 1992; pp 107-158.
    • (1992) Cyclic Organonitrogen Stereodynamics , pp. 107-158
    • Jennings, W.B.1    Boyd, D.R.2
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    • 0031559456 scopus 로고    scopus 로고
    • Majerz, 1.; Malarski, Z.; Sobczyk, L. Chem. Phys. Lett. 1997, 274, 361-364.
    • (b) Majerz, 1.; Malarski, Z.; Sobczyk, L. Chem. Phys. Lett. 1997, 274, 361-364.
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    • 48249091122 scopus 로고    scopus 로고
    • Ratajczak, H. Electron Proton Transfer Chem. Biol. 1992, 78, 293-310.
    • (c) Ratajczak, H. Electron Proton Transfer Chem. Biol. 1992, 78, 293-310.
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    • Int. Ed
    • Steiner, T. Angw. Chem., Int. Ed. 2002, 41, 48-76.
    • (2002) Angw. Chem , vol.41 , pp. 48-76
    • Steiner, T.1
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    • Bushweller, C. H. In Acyclic Organonitrogen Stereodynamics; Lambert, J. B, ; Takeuchi, E., Eds.; VCH Publishers: New York, 1992; pp 1-55.
    • (a) Bushweller, C. H. In Acyclic Organonitrogen Stereodynamics; Lambert, J. B, ; Takeuchi, E., Eds.; VCH Publishers: New York, 1992; pp 1-55.
  • 54
    • 48249083310 scopus 로고    scopus 로고
    • The opposite is incorrect: NIR and some rotations may be not coupled with RI (see Section 3a).
    • The opposite is incorrect: NIR and some rotations may be not coupled with RI (see Section 3a).
  • 57
    • 48249091543 scopus 로고    scopus 로고
    • Macromodel, Version 6.5; Department of Chemistry, Columbia University: New York
    • (c) Macromodel, Version 6.5; Department of Chemistry, Columbia University: New York.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.