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Volumn 118, Issue 30, 1996, Pages 7075-7082

Conjugatively stabilized bridgehead olefins: Formation and reaction of remarkably stable homoadamant-3-enes substituted with phenyl and methoxycarbonyl groups

Author keywords

[No Author keywords available]

Indexed keywords

ADAMANTANE DERIVATIVE;

EID: 0029744631     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja953977q     Document Type: Article
Times cited : (33)

References (77)
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    • Keese, R.1    Luef, W.2
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    • note
    • 2. However, the yield of 7 was low, as estimated from the cycloadduct 11 (34% yield), and the long reaction time (2 h) resulted in the formation of byproducts [e.g., α-(1-adamantyl)benzyl alcohol].
  • 43
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    • note
    • 1H NMR signals of the products (16: δ 6.21. 35: δ 3.49) to those of an internal standard (benzyl ether: δ 4.56).
  • 50
    • 9344229344 scopus 로고    scopus 로고
    • Concentration of the solution: ca. 0.035 M
    • Concentration of the solution: ca. 0.035 M.
  • 55
    • 0000849767 scopus 로고
    • See also: (d) Cox, G. G.; Haigh, D.; Hindley, R. M.; Miller D. J.; Moody, C. J. Tetrahedron Lett. 1994, 35, 3139. (e) Pirrung, M. C.; Morehead, A. T., Jr. J. Am. Chem. Soc. 1994, 116, 8991.
    • (1994) J. Am. Chem. Soc. , vol.116 , pp. 8991
    • Pirrung, M.C.1    Morehead Jr., A.T.2
  • 59
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    • note
    • s symmetry
  • 62
    • 0001231433 scopus 로고
    • Padwa A., Ed.; J. Wiley & Sons: New York, Chapter 5
    • Lwowski, W. 1,3-Dipolar Cycloaddition Chemistry; Padwa A., Ed.; J. Wiley & Sons: New York, 1984; Vol. 1, Chapter 5.
    • (1984) 1,3-Dipolar Cycloaddition Chemistry , vol.1
    • Lwowski, W.1
  • 67
    • 9344226869 scopus 로고    scopus 로고
    • note
    • 2) was previously reported to stabilize the bicyclo[3.3.1]non-1-en-3-one system: see ref 12a.
  • 68
    • 0002228091 scopus 로고
    • MOPAC Ver 5.00 (QCPE No. 445): Stewart J. J. P. QCPE Bull. 1989, 9, 10. Hirano, T. JCPE Newsletter 1989, 9(2), 36. Revised as Ver 5.01 by J. Toyoda for Apple Macintosh. HyperChem. 4.0 (Hypercube Inc.) on an IBM compatible computer.
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    • Stewart, J.J.P.1
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    • Revised as Ver 5.01 by J. Toyoda for Apple Macintosh. HyperChem. 4.0 (Hypercube Inc.) on an IBM compatible computer
    • MOPAC Ver 5.00 (QCPE No. 445): Stewart J. J. P. QCPE Bull. 1989, 9, 10. Hirano, T. JCPE Newsletter 1989, 9(2), 36. Revised as Ver 5.01 by J. Toyoda for Apple Macintosh. HyperChem. 4.0 (Hypercube Inc.) on an IBM compatible computer.
    • (1989) JCPE Newsletter , vol.9 , Issue.2 , pp. 36
    • Hirano, T.1
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    • H° caused by substituting phenyl and methoxycarbonyl groups for a hydrogen are assumed to be about - 1 to - 4 kcal/mol (cf. Jesen, J. L. Prog. Phys. Org. Chem. 1976, 12. 189), the OS's of 1 and 2 can be estimated to be slightly lower than that of 3.
    • (1976) Prog. Phys. Org. Chem. , vol.12 , pp. 189
    • Jesen, J.L.1
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    • 9344232055 scopus 로고    scopus 로고
    • note
    • 13C NMR as soon as Rh-catalyzed decomposition was complete. Although the sample used was a crude product, olefinic signals could be distinguished from noisy signals due to contaminants.
  • 72
    • 9344260964 scopus 로고
    • Compounds 47 and 48 were prepared from cyclohexanone and the corresponding phosphonate reagents according to previously reported procedures - for 47: Shakak, I.; Almong, J.; Bergman, E. D. Isr. J. Chem. 1969, 9, 585. For 48: Courout, P.; Ghribi, A. Synthesis 1991, 790.
    • (1969) Isr. J. Chem. , vol.9 , pp. 585
    • Shakak, I.1    Almong, J.2    Bergman, E.D.3
  • 73
    • 9344263017 scopus 로고
    • Compounds 47 and 48 were prepared from cyclohexanone and the corresponding phosphonate reagents according to previously reported procedures - for 47: Shakak, I.; Almong, J.; Bergman, E. D. Isr. J. Chem. 1969, 9, 585. For 48: Courout, P.; Ghribi, A. Synthesis 1991, 790.
    • (1991) Synthesis , pp. 790
    • Courout, P.1    Ghribi, A.2
  • 74
    • 9344234514 scopus 로고    scopus 로고
    • note
    • 1H NMR signals were observed at δ 1.41-2.52 (15 H, m) and 7.12-7.37 (5 H, m) for 1 and at δ 1.45-2.20 (15 H, m) and 3.70 (3 H, s) for 2.


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