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Volumn 5, Issue 24, 2007, Pages 3922-3931

Asymmetric synthesis of β-amino-γ-substituted-γ- butyrolactones: Double diastereoselective conjugate addition of homochiral lithium amides to homochiral α,β-unsaturated esters

Author keywords

[No Author keywords available]

Indexed keywords

AMIDES; CHIRALITY; CYCLIZATION; STEREOSELECTIVITY; SUBSTITUTION REACTIONS; SYNTHESIS (CHEMICAL);

EID: 36749051660     PISSN: 14770520     EISSN: None     Source Type: Journal    
DOI: 10.1039/b712937h     Document Type: Article
Times cited : (47)

References (65)
  • 48
    • 84943009986 scopus 로고    scopus 로고
    • note
    • An analogous argument was proposed by Yamamoto to explain the selectivity observed upon conjugate addition of lithium N-benzyl-N-trimethylsilylamide 6 and lithium dibenzylamide 12 to a range of mandelate- and lactate-derived α,β-unsaturated esters; see reference 6 within.
  • 53
    • 0035900461 scopus 로고    scopus 로고
    • The relative 3,4-anti-configuration of 39 determined from the X-ray crystal structure also allows the assigned relative 3,4-anti-configuration within β-amino ester 31 to be unambiguously confirmed It seems likely that epimerisation of the lactone rather than the ester is taking place as lactones are know to be relatively acidic; for selected examples see:
    • H. M. L. Davies L. M. Hodges T. M. Gregg J. Org. Chem. 2001 66 7898
    • (2001) J. Org. Chem. , vol.66 , pp. 7898
    • Davies, H.M.L.1    Hodges, L.M.2    Gregg, T.M.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.