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Volumn 2, Issue 15, 2000, Pages 2229-2232

A highly efficient asymmetric synthesis of optically active α,γ-substituted γ-butyrolactones using a chiral auxiliary derived from isosorbide

Author keywords

[No Author keywords available]

Indexed keywords

GAMMA BUTYROLACTONE; ISOSORBIDE; KETONE; METHACRYLIC ACID DERIVATIVE; PROTON;

EID: 0034720960     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol005978f     Document Type: Article
Times cited : (47)

References (35)
  • 20
    • 0032543482 scopus 로고    scopus 로고
    • For ligand-controlled asymmetric synthesis, see: (p) Mikami, K.; Yamaoka, M. Tetrahedron Lett. 1998, 39, 4501-4504.
    • (1998) Tetrahedron Lett. , vol.39 , pp. 4501-4504
    • Mikami, K.1    Yamaoka, M.2
  • 22
    • 0001593823 scopus 로고    scopus 로고
    • During the preparation of this manuscript, a method was reported for the synthesis of cis-α,γ-dialkyl γ-lactones using chiral sec-dialkyl bishomopropargylic alcohols as the reactant; see: Diaz, D.; Martin, V. S.; Org. Lett. 2000, 2, 335-337.
    • (2000) Org. Lett. , vol.2 , pp. 335-337
    • Diaz, D.1    Martin, V.S.2
  • 25
    • 33751146774 scopus 로고    scopus 로고
    • For a review of asymmetric protonation of enolates and enols, see: (a) Fehr, C. Angew. Chem., Int. Ed. Engl. 1996, 35, 2566-2587.
    • (1996) Angew. Chem., Int. Ed. Engl. , vol.35 , pp. 2566-2587
    • Fehr, C.1
  • 31
    • 85037503661 scopus 로고    scopus 로고
    • Ph. D. dissertation, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, P. R. China
    • Xu, M.-H. Ph. D. dissertation, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, P. R. China, 1999. The detailed and further investigations of the asymmetric protonations will be published elsewhere.
    • (1999)
    • Xu, M.-H.1
  • 33
    • 85037510075 scopus 로고    scopus 로고
    • note
    • In an effort to maximize the results, other chiral auxiliaries were also surveyed. With N-isopropylephedrine (2) as chiral auxiliary, chiral γ-butyrolactone 1 was obtained in only 30% ee. However, 2 is a good chiral auxiliary in the synthesis of chiral 4-substituted- and cis-3,4-disubstituted-γ-butyrolactones; see: note (12) of ref 4.
  • 34
    • 85037495856 scopus 로고    scopus 로고
    • note
    • Since (-)-sultam (4) is commercially available and not expensive, we still use it as the chiral proton source instead of (±)-sultam.
  • 35
    • 85037518599 scopus 로고    scopus 로고
    • note
    • -3.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.