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Volumn 53, Issue 21, 1997, Pages 7201-7208

Highly enantioselective cyclopropanation of styrene derivatives using Co(III)-salen complex as a catalyst

Author keywords

[No Author keywords available]

Indexed keywords

CYCLOPROPANE DERIVATIVE; STYRENE DERIVATIVE;

EID: 0030915731     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4020(97)00423-7     Document Type: Article
Times cited : (145)

References (47)
  • 23
    • 0030601947 scopus 로고    scopus 로고
    • For the recent review of Mn-salen catalyzed epoxidation, see: a) Katsuki, T. J. Mol. Cat. 1996, 113, 87-107.
    • (1996) J. Mol. Cat. , vol.113 , pp. 87-107
    • Katsuki, T.1
  • 25
    • 0002578608 scopus 로고
    • Asymmetric Catalytic Epoxidation of Unfunctionalized Olefins
    • Ojima I. Eds.; VCH publishers, Inc.: New York
    • c) Jacobsen, E. N. Asymmetric Catalytic Epoxidation of Unfunctionalized Olefins. In Catalytic Asymmetric Synthesis; Ojima I. Eds.; VCH publishers, Inc.: New York, 1993; pp. 159-202.
    • (1993) Catalytic Asymmetric Synthesis , pp. 159-202
    • Jacobsen, E.N.1
  • 33
    • 0003173850 scopus 로고
    • A part of this study has been communicated: Fukuda, T.; Katsuki, T. Synlett 1995, 825-826.
    • (1995) Synlett , pp. 825-826
    • Fukuda, T.1    Katsuki, T.2
  • 40
    • 26844579417 scopus 로고    scopus 로고
    • note
    • In the reviewing process, a referee suggested use of a Co(III)-salen complex bearing electron-donating groups at C4(4′) and C5(5′) carbons. According to the suggestion, we examined the reaction of styrene and tert-butyl diazoacetate in the presence of complex i at room temperature and found that the reaction gave a 96:4 mixture of tert-butyl trans- and cis-2-phenylcyclopropane-1-carboxylate in 84%. The enantiomeric excess of the trans-isomer was 89%, which was inferior to that observed with complex (6-Br). (Chemical Equation Presented)
  • 43
    • 0001087427 scopus 로고
    • Electronic effect of the substituent of the salen ligand on enantioselectivity in Mn-salen catalyzed epoxidation has been discussed: Jacobsen, E. N.; Zhang, W.; Güler, M. L. J. Am. Chem. Soc. 1991, 113 6703-6704.
    • (1991) J. Am. Chem. Soc. , vol.113 , pp. 6703-6704
    • Jacobsen, E.N.1    Zhang, W.2    Güler, M.L.3
  • 44
    • 26844495384 scopus 로고    scopus 로고
    • note
    • The aldehyde was purchased from nacalai tesque and used after distillation.
  • 45
    • 26844475164 scopus 로고    scopus 로고
    • note
    • 2O by heating at 70°C under vacuum for 2 h.
  • 47
    • 26844506810 scopus 로고    scopus 로고
    • note
    • 1H NMR spectroscopic data with those of tert-butyl trans- and cis-2-phenylcyclopropane-1-carboxylates (reference 3b).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.