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Volumn 9, Issue 17, 2007, Pages 3437-3439

Quinoidal tetrazines: Formation of a fascinating compound class

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EID: 34548191770     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol701442h     Document Type: Article
Times cited : (24)

References (32)
  • 3
    • 47749122232 scopus 로고    scopus 로고
    • 1st ed, Berkessel, A, Gröger, H, Eds, Wiley-VCH: Weinheim
    • Asymmetric Organocatalysis, 1st ed.; Berkessel, A., Gröger, H., Eds.; Wiley-VCH: Weinheim, 2005.
    • (2005) Asymmetric Organocatalysis
  • 22
    • 34548185391 scopus 로고    scopus 로고
    • For details see the Supporting Information
    • For details see the Supporting Information.
  • 23
    • 34548159419 scopus 로고    scopus 로고
    • ESR studies on 3a, 3c, and 3e ruled out the presence of any radical character both in solution and in the solid state.
    • ESR studies on 3a, 3c, and 3e ruled out the presence of any radical character both in solution and in the solid state.
  • 28
    • 34548155932 scopus 로고    scopus 로고
    • 3 were stirred in the degassed solvent in a capped vial at 75-80 °C for 40 min under an argon atmosphere. The preheated solution of 1 (1 equiv) in the appropriate solvent was added via cannula, and the mixture was stirred at the same temperature until all starting material was consumed as judged by TLC After removal of the volatiles in a vacuum, the product was purified by column chromatography on silica gel, using methanol/ethylacetate (1:4) as eluent.
    • 3 were stirred in the degassed solvent in a capped vial at 75-80 °C for 40 min under an argon atmosphere. The preheated solution of 1 (1 equiv) in the appropriate solvent was added via cannula, and the mixture was stirred at the same temperature until all starting material was consumed as judged by TLC After removal of the volatiles in a vacuum, the product was purified by column chromatography on silica gel, using methanol/ethylacetate (1:4) as eluent.
  • 29
    • 34548184623 scopus 로고    scopus 로고
    • N,Ń-Bis(2,6-diisopropyl-phenyl)-imidazolium salts (IPr) and their dihydro analogue (SIPr) led to the decomposition of 1 without traces of 3.
    • N,Ń-Bis(2,6-diisopropyl-phenyl)-imidazolium salts (IPr) and their dihydro analogue (SIPr) led to the decomposition of 1 without traces of 3.
  • 31
    • 34548181047 scopus 로고    scopus 로고
    • The reaction of 1 and carbonates does not lead to the displacement of the pyrazole unit, unlike in the case of hydroxides, which give the appropriate substitution product. For details, see ref 8
    • The reaction of 1 and carbonates does not lead to the displacement of the pyrazole unit, unlike in the case of hydroxides, which give the appropriate substitution product. For details, see ref 8.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.