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Volumn 630, Issue 1, 2001, Pages 78-83

An explanation for the apparent cis-aziridine selectivity in the iron Lewis acid-catalyzed reaction of N-benzylidene aniline and ethyl diazoacetate

Author keywords

Aziridines; Ethyl diazoacetate; Imines; Iron Lewis acid

Indexed keywords


EID: 0039784063     PISSN: 0022328X     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0022-328X(01)00886-5     Document Type: Article
Times cited : (22)

References (48)
  • 25
    • 0041113442 scopus 로고    scopus 로고
    • For recent reviews, see: (a) in: E.N. Jacobsen, A. Pfaltz, H. Yamamoto (Eds.), Springer, New York, Chap. 17
    • For recent reviews, see: (a) E.N. Jacobsen, in: E.N. Jacobsen, A. Pfaltz, H. Yamamoto (Eds.), Comprehensive Asymmetric Catalysis, Springer, New York, 1999, Chap. 17;
    • (1999) Comprehensive Asymmetric Catalysis
    • Jacobsen, E.N.1
  • 34
    • 0040519367 scopus 로고    scopus 로고
    • Useful but limited models were proposed in references: [1b,e,3d,8a,b].
    • Useful but limited models were proposed in references: [1b,e,3d,8a,b].
  • 36
    • 0039334163 scopus 로고    scopus 로고
    • It is also interesting to note that different catalysts reportedly produce either the AUE by-products or (diethyl maleate and fumarate) by-products but rarely both types. These by-product types are likely indicators of mechanisms involving either an activated imine intermediate or a carbenoid intermediate, respectively. Furthermore, these by-product types often correlate with producing a predominance of the cis or the trans-aziridine products, respectively.
    • It is also interesting to note that different catalysts reportedly produce either the AUE by-products or (diethyl maleate and fumarate) by-products but rarely both types. These by-product types are likely indicators of mechanisms involving either an activated imine intermediate or a carbenoid intermediate, respectively. Furthermore, these by-product types often correlate with producing a predominance of the cis or the trans-aziridine products, respectively.
  • 37
    • 0039926488 scopus 로고    scopus 로고
    • 1H-NMR spectroscopy. However, no selective catalytic decomposition of trans-aziridine was noted.
    • 1H-NMR spectroscopy. However, no selective catalytic decomposition of trans-aziridine was noted.
  • 38
    • 0041113443 scopus 로고    scopus 로고
    • This conclusion is in agreement with a footnote mentioned by other authors in Ref. [1i].
    • This conclusion is in agreement with a footnote mentioned by other authors in Ref. [1i].
  • 46
    • 0039334166 scopus 로고    scopus 로고
    • This is not to say that the aziridine cannot be catalytically prepared from N-(4-methoxybenzylidene)aniline and 3, because it is formed and isolated in a couple of reports. It may be obtained when a carbenoid mechanism may be operative [1h,j,k] or when the Lewis acid is hindered [1c] from binding to the nitrogen of the aziridine ring.
    • This is not to say that the aziridine cannot be catalytically prepared from N-(4-methoxybenzylidene)aniline and 3, because it is formed and isolated in a couple of reports. It may be obtained when a carbenoid mechanism may be operative [1h,j,k] or when the Lewis acid is hindered [1c] from binding to the nitrogen of the aziridine ring.
  • 47
    • 0039926492 scopus 로고    scopus 로고
    • The synthesis of 2 and the procedure for the catalytic reaction of the imine (2), using slow addition of 3, are fully described in Ref. [7].
    • The synthesis of 2 and the procedure for the catalytic reaction of the imine (2), using slow addition of 3, are fully described in Ref. [7].


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.