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Volumn 50, Issue 37, 2009, Pages 5186-5189

Efficient synthesis of 2-(pyrazol-3-yl)benzimidazoles from 3-arylacylidene-3,4-dihydroquinoxalin-2(1H)-ones and hydrazine hydrate via a novel rearrangement

Author keywords

Benzimidazole; Dihydroquinoxalin 2(1H) one; Hydrazine hydrate; Novel rearrangement; Pyrazolylbenzimidazoles; Ring contraction

Indexed keywords

2 (PYRAZOL 3 YL)BENZIMIDAZOLE DERIVATIVE; BENZIMIDAZOLE DERIVATIVE; HETEROCYCLIC COMPOUND; HYDRAZINE; QUINOXALINE DERIVATIVE; UNCLASSIFIED DRUG;

EID: 67650902488     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2009.05.116     Document Type: Article
Times cited : (37)

References (45)
  • 18
    • 0040482632 scopus 로고
    • Tamm I. Science 126 (1957) 1235
    • (1957) Science , vol.126 , pp. 1235
    • Tamm, I.1
  • 33
    • 84986468559 scopus 로고    scopus 로고
    • note
    • For the synthesis of 1a and 1f, see: Amer, A.; Ventura, M.; Zimmer, H. J. Heterocycl. Chem. 1983, 20, 359. Quinoxalinones 1b-e were prepared by the method used for 1a. Mp 298-299 °C (1b); 302-303 °C (1c); 304-306 °C (1d); 252-253 °C (1e).
  • 34
    • 67650956315 scopus 로고    scopus 로고
    • note
    • 4O: C, 69.05; H, 5.07; N, 20.13. Found: C, 68.83; H, 4.92; N, 20.19.
  • 35
    • 67650947205 scopus 로고    scopus 로고
    • note
    • 4: C, 73.83; H, 4.65; N, 21.52. Found: C, 73.41; H, 4.58; N, 21.50.
  • 38
    • 67650984878 scopus 로고    scopus 로고
    • note
    • -3). Crystallographic data (excluding structure factors) for the structure 2e reported in this Letter have been deposited at the Cambridge Crystallographic Data Centre with supplementary Publication Number CCDC 724170. Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK, (fax: +44 0 1223 336033 or e-mail: deposit@ccdc.cam.ac.uk).
  • 39
    • 67650956314 scopus 로고    scopus 로고
    • note
    • -3). Crystallographic data (excluding structure factors) for the structure 3a reported in this Letter have been deposited at the Cambridge Crystallographic Data Centre with supplementary Publication Number CCDC 724169. Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK, (fax: +44 0 1223 336033 or e-mail: deposit@ccdc.cam.ac.uk).
  • 44
    • 0013072106 scopus 로고
    • Weissberger A., and Taylor E.C. (Eds), Wiley-Interscience, New York
    • Cheeseman G.W.H., and Cookson R.F. In: Weissberger A., and Taylor E.C. (Eds). Condensed Pyrazines Vol. 35 (1979), Wiley-Interscience, New York
    • (1979) Condensed Pyrazines , vol.35
    • Cheeseman, G.W.H.1    Cookson, R.F.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.