메뉴 건너뛰기




Volumn , Issue 16, 1996, Pages 1999-2003

Studies on pyrimidine-annelated heterocycles: Synthesis of novel pyrazolo[3′,4′:4,5]pyrido[2,3-d]pyrimidines by intramolecular 1,3-dipolar cycloadditions

Author keywords

[No Author keywords available]

Indexed keywords


EID: 33748915610     PISSN: 0300922X     EISSN: None     Source Type: Journal    
DOI: 10.1039/P19960001999     Document Type: Article
Times cited : (6)

References (57)
  • 1
    • 0000525785 scopus 로고
    • ed. D. Barton and W. D. Ollis, Pergamon Press, Oxford
    • (a) E. Lunt, Comprehensive Organic Chemistry, ed. D. Barton and W. D. Ollis, Pergamon Press, Oxford, 1974, vol. 4, 493;
    • (1974) Comprehensive Organic Chemistry , vol.4 , pp. 493
    • Lunt, E.1
  • 2
    • 84944034682 scopus 로고
    • ed. A. R. Katritzky and C. W. Rees, Pergamon Press, Oxford
    • (b) J. D. Brown, Comprehensive Heterocyclic Chemistry, ed. A. R. Katritzky and C. W. Rees, Pergamon Press, Oxford, 1984, vol. 3, p. 57;
    • (1984) Comprehensive Heterocyclic Chemistry , vol.3 , pp. 57
    • Brown, J.D.1
  • 10
    • 0028876870 scopus 로고
    • Certainly functionalisation of uracils at the C-5 and C-6 positions leads to biologically interesting molecules but is not a simple task requiring, rather, sophisticated and tedious reaction conditions see: (a) N. G. Kundu and P. Das, J. Chem. Soc., Chem. Commun., 1995, 99;
    • (1995) J. Chem. Soc., Chem. Commun. , pp. 99
    • Kundu, N.G.1    Das, P.2
  • 27
    • 33748885003 scopus 로고
    • ed. R. C. Elderfield, New York
    • (b) R. K. Robins, Heterocyclic Compounds, ed. R. C. Elderfield, New York, 1967, vol. 8
    • (1967) Heterocyclic Compounds , vol.8
    • Robins, R.K.1
  • 41
    • 37049070668 scopus 로고
    • For the hydrazone-azomethine imine tautomerisation by a thermal 1,2-proton shift see; R, Grigg, Chem. Soc. Rev., 1987, 16, 89 and references cited therein.
    • (1987) Chem. Soc. Rev. , vol.16 , pp. 89
    • Grigg, R.1
  • 43
    • 0000730265 scopus 로고
    • Thiophene has a lower lying HOMO level than does furan, which increases the energy gap between the interacting FMOs, thereby diminishing the cycloaddition rate. Indeed, this is probably why so little is known about dipolar cycloaddition across thiophene rings see: A. Padwa, D. L. Hertzog and W. R. Nadler, J. Org. Chem., 1994, 59, 7072.
    • (1994) J. Org. Chem. , vol.59 , pp. 7072
    • Padwa, A.1    Hertzog, D.L.2    Nadler, W.R.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.