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Volumn 7, Issue 9, 2005, Pages 1769-1772

5-Endo-dig electrophilic cyclization of 1,4-disubstituted but-3-yn-1-ones: Regiocontrolled synthesis of 2,5-disubstituted 3-bromo- and 3-iodofurans

Author keywords

[No Author keywords available]

Indexed keywords

ACETONE; BROMINE DERIVATIVE; FURAN DERIVATIVE; IODINE DERIVATIVE; KETONE DERIVATIVE; SUCCINIMIDE DERIVATIVE;

EID: 18844373078     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol050372i     Document Type: Article
Times cited : (173)

References (78)
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    • (1994) Houben-Weyl , vol.E6A , Issue.1 TEIL
    • Eberbach, W.F.1
  • 7
    • 0000964586 scopus 로고    scopus 로고
    • Benzo Derivatives: Synthesis; Katritzky, A. R., Rees, C. W., Scriven, E. F. V., Eds.; Pergamon Press: Oxford
    • (f) Friedrichsen, W. Furans and Benzo Derivatives: Synthesis. In Comprehensive Heterocyclic Chemistry II; Katritzky, A. R., Rees, C. W., Scriven, E. F. V., Eds.; Pergamon Press: Oxford, 1996; Vol. 2, pp 351-394.
    • (1996) Comprehensive Heterocyclic Chemistry II , vol.2 , pp. 351-394
    • Friedrichsen, W.F.1
  • 8
  • 51
    • 33748601886 scopus 로고    scopus 로고
    • NBS bromination of 2-(4-methoxyphenyl)-5-(4-nitrophenyl)furan (benzene, reflux) yields of 3-bromo-2-(4-methoxyphenyl)-5-(4-nitrophenyl)-furan in 44% yield: Rees, C. W.; Yue, T.-Y. J. Chem. Soc., Perkin Trans. 1 1997, 2247-2252.
    • (1997) J. Chem. Soc., Perkin Trans. 1 , pp. 2247-2252
    • Rees, C.W.1    Yue, T.-Y.2
  • 53
    • 84986405913 scopus 로고
    • see also ref 12
    • Obrecht, D. Helv. Chim. Acta 1989, 72, 447-456; see also ref 12.
    • (1989) Helv. Chim. Acta , vol.72 , pp. 447-456
    • Obrecht, D.1
  • 62
    • 77956731781 scopus 로고    scopus 로고
    • Electrophile-Induced 5-Endo Cyclizations
    • Gribble, G. W., Gilchrist, T. L., Eds.; Pergamon Press: Oxford
    • Knight, D. W. Electrophile-Induced 5-Endo Cyclizations. In Progress in Heterocyclic Chemistry; Gribble, G. W., Gilchrist, T. L., Eds.; Pergamon Press: Oxford, 2002; Vol. 14, pp 19-51.
    • (2002) Progress in Heterocyclic Chemistry , vol.14 , pp. 19-51
    • Knight, D.W.1
  • 72
    • 18844370823 scopus 로고    scopus 로고
    • note
    • Anhydrous (commercial) ether was used. Extraction with reagent grade ether leads to the "leaching" of the succinimide likely due to water and ethanol contents. This step is obviously not necessary for reaction with ICl.
  • 73
    • 18844378287 scopus 로고    scopus 로고
    • note
    • 3) gave a colorless fraction. Solvent was removed by rotary evaporation and the residue was dried by oil vacuum pump to give 5a as a white solid (0.238 g, 0.760 mmol. 89%). The compound can be recrystallized from methanol.
  • 77
    • 18844366067 scopus 로고    scopus 로고
    • note
    • A mechanistic pathway may include cyclization followed by a deprotonation (right structure) or α-hydrogen abstraction (left structure). (Chemical Equation Presented)
  • 78
    • 18844400497 scopus 로고    scopus 로고
    • Crystallographic data (excluding structural factors) for the structure reported in this paper were also deposited with Cambridge Crystallographic Data Centre as supplementary publication no. CCDC-265867. These data can be obtained free of charge via www.ccdc.cam.ac.uk/data_request/cif, by e-mailing data_request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, U.K.; fax: +44(0)1223-336033.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.