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Volumn , Issue 20-21, 2011, Pages 3837-3848

Facile access to 3,5-dihalogenated pyrazoles by sydnone cycloaddition and their versatile functionalization by Pd-catalyzed cross-coupling processes

Author keywords

Alkynes; Cross coupling; Cycloaddition; Nitrogen heterocycles; Polyhalides

Indexed keywords


EID: 79960316996     PISSN: 1434193X     EISSN: 10990690     Source Type: Journal    
DOI: 10.1002/ejoc.201100119     Document Type: Article
Times cited : (24)

References (59)
  • 6
    • 13644268558 scopus 로고    scopus 로고
    • For reviews on site-selective cross-coupling reactions of multiply halogenated heterocycles, see S. Schröter, C. Stock, T. Bach, Tetrahedron 2005, 61, 2245.
    • (2005) Tetrahedron , vol.61 , pp. 2245
    • Schröter, S.1    Stock, C.2    Bach, T.3
  • 25
    • 68149154803 scopus 로고    scopus 로고
    • In contrast, efficient methods are available for C-4 halogenation of pyrazoles
    • C. Despotopoulou, L. Klier, P. Knochel, Org. Lett. 2009, 11, 3326. In contrast, efficient methods are available for C-4 halogenation of pyrazoles
    • (2009) Org. Lett. , vol.11 , pp. 3326
    • Despotopoulou, C.1    Klier, L.2    Knochel, P.3
  • 26
    • 33846986841 scopus 로고    scopus 로고
    • and references cited therein
    • Z.-G. Zhao, Z.-X. Wang, Synth. Commun. 2007, 37, 137 and references cited therein.
    • (2007) Synth. Commun. , vol.37 , pp. 137
    • Zhao, Z.-G.1    Wang, Z.-X.2
  • 31
    • 71749097873 scopus 로고    scopus 로고
    • For an overview of recent sydnone chemistry, see
    • For an overview of recent sydnone chemistry, see:, D. L. Browne, J. P. A. Harrity, Tetrahedron 2010, 66, 553.
    • (2010) Tetrahedron , vol.66 , pp. 553
    • Browne, D.L.1    Harrity, J.P.A.2
  • 36
  • 39
    • 77955346583 scopus 로고    scopus 로고
    • During the finalization of this work, Langer reported site-selective Suzuki-Miyaura reactions of tribromopyrazoles
    • During the finalization of this work, Langer reported site-selective Suzuki-Miyaura reactions of tribromopyrazoles:, R. S. Khera, A. Ali, M. Hussain, J. Tatar, A. Villinger, P. Langer, Synlett 2010, 1923.
    • (2010) Synlett , pp. 1923
    • Khera, R.S.1    Ali, A.2    Hussain, M.3    Tatar, J.4    Villinger, A.5    Langer, P.6
  • 42
    • 76249089957 scopus 로고    scopus 로고
    • One-pot double Suzuki-Miyaura cross-coupling reactions are rare and often require additional base, catalyst, or ligand to cross-couple the second boronic acid efficiently. For illustrative examples, see M. F. Ibad, M. Hussain, O.-U.-R. Abid, A. Ali, I. Ullah, D. S. Zinad, P. Langer, Synlett 2010, 411.
    • (2010) Synlett , pp. 411
    • Ibad, M.F.1    Hussain, M.2    Ali, A.3    Ullah, I.4    Zinad, D.S.5    Langer, P.6    Abid, O.-U.-R.7


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.