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Volumn 39, Issue 16, 2000, Pages 2893-2897

Enantioselective synthesis of 4-unsubstituted 3-alkoxy- and 3-aminoazetidin-2-ones from formaldehyde N,N-dialkylhydrazones

Author keywords

Asymmetric synthesis; Cycloadditions; Hydrazones; Ketenes; Lactams

Indexed keywords

AZETIDINE DERIVATIVE; FORMALDEHYDE; HYDRAZONE DERIVATIVE; KETENE DERIVATIVE; LACTAM;

EID: 0039592749     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-3773(20000818)39:16<2893::AID-ANIE2893>3.0.CO;2-E     Document Type: Article
Times cited : (69)

References (33)
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    • As a remarkable exception, N-methylene[bis(trimethylsilyl)methyl]-amine has recently been described as a stable, monomeric compound suitable for cycloaddition reactions with ketenes: C. Palomo, J. M. Aizpurua, M. Legido, R. Lagarza, Chem. Commun. 1997, 233.
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    • e) R. Fernández, E. Martín, C. Pareja, J. Vázquez, E. Díez, A. Monge, J. M. Lassaletta, Angew. Chem. 1998, 110, 3598; Angew. Chem. Int. Ed. 1998, 37, 3428;
    • (1998) Angew. Chem. Int. Ed. , vol.37 , pp. 3428
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    • 0025083007 scopus 로고
    • The cycloaddition reaction of phenoxyketene with ketone hydrazones to give racemic 1-amino β-lactams has been reported. Surprisingly, no yields were included: S. D. Sharma, S. B. Pandhi, J. Org. Chem. 1990, 55, 2196.
    • (1990) J. Org. Chem. , vol.55 , pp. 2196
    • Sharma, S.D.1    Pandhi, S.B.2
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    • 0345148379 scopus 로고    scopus 로고
    • In contrast with 1a-e, hydrazone 1f failed in the 1,2 addition to trifluoromethyl ketones: C. Pareja, E. Martín-Zamora, R. Fernández, J. M. Lassaletta, J. Org. Chem. 1999, 64, 8846. In addition, ab initio calculations predict an almost perfect planar geometry for the hydrazone moiety in the transition states corresponding to the addition of N,N-dialkylhydrazones to π-electrophiles: R. R. Pappalardo, J. M. Muñoz, R. Fernández, J. M. Lassaletta, unpublished results.
    • (1999) J. Org. Chem. , vol.64 , pp. 8846
    • Pareja, C.1    Martín-Zamora, E.2    Fernández, R.3    Lassaletta, J.M.4
  • 23
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    • unpublished results
    • In contrast with 1a-e, hydrazone 1f failed in the 1,2 addition to trifluoromethyl ketones: C. Pareja, E. Martín-Zamora, R. Fernández, J. M. Lassaletta, J. Org. Chem. 1999, 64, 8846. In addition, ab initio calculations predict an almost perfect planar geometry for the hydrazone moiety in the transition states corresponding to the addition of N,N-dialkylhydrazones to π-electrophiles: R. R. Pappalardo, J. M. Muñoz, R. Fernández, J. M. Lassaletta, unpublished results.
    • Pappalardo, R.R.1    Muñoz, J.M.2    Fernández, R.3    Lassaletta, J.M.4
  • 30
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    • The scope and mechanistic aspects of this novel reaction are currently under study in our laboratory
    • The scope and mechanistic aspects of this novel reaction are currently under study in our laboratory.
  • 31
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    • note
    • 2; conventional R factors are based on F. The configuration of C-3 is based on that known for C-2′ in the auxiliary. Crystallographic data (excluding structure factors) for the structure reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication no. CCDC-135522. Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (fax: (+ 44) 1223-336-033; e-mail: deposit@ccdc.cam.ac.uk).
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    • note
    • 3OH); D. M. Floyd, A. W. Fritz, J. Pluscec, E. R. Weaver, C. M. Cimarusti, J. Org. Chem. 1982, 47, 5160.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.