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Volumn 20, Issue 23, 2009, Pages 2651-2654

Enantioselective Michael reaction of β-keto esters organocatalyzed by recoverable Cinchona-derived dimeric ammonium salts

Author keywords

[No Author keywords available]

Indexed keywords

AMMONIUM DERIVATIVE; BETA KETO ESTER DERIVATIVE; CINCHONIDINE; ESTER DERIVATIVE; QUININE; UNCLASSIFIED DRUG;

EID: 76449115669     PISSN: 09574166     EISSN: 1362511X     Source Type: Journal    
DOI: 10.1016/j.tetasy.2009.11.007     Document Type: Article
Times cited : (25)

References (44)
  • 3
    • 0842322178 scopus 로고    scopus 로고
    • Reviews:
    • Reviews:. Jha S.C., and Joshi N.N. Arkivoc vii (2002) 167-196
    • (2002) Arkivoc , vol.vii , pp. 167-196
    • Jha, S.C.1    Joshi, N.N.2
  • 26
  • 39
    • 76449118743 scopus 로고    scopus 로고
    • note
    • Enantioselectivities were determined by chiral HPLC using Chiralcel OJ (5aa,ba,ca,da,ea) and Chiralcel OD-H (5ab,db,ac,ad,ae) columns and n-hexane/2-propanol mixtures as eluent. Reference racemic samples of adducts 5 were prepared by performing the enantioselective Michael reaction in the absence of chiral ammonium salt.
  • 40
    • 76449112636 scopus 로고    scopus 로고
    • note
    • Absolute configuration for adducts 5aa,ba,ac (Ref. 4a), 5ab (Ref. 10b) and 5ae (Ref. 10c) was determined according to the described order of elution of their enantiomers in chiral HPLC. The absolute configuration of other adducts was assigned by analogy.
  • 41
    • 76449089022 scopus 로고    scopus 로고
    • note
    • C 157.9, 147.4, 145.4, 143.8, 138.0, 137.9, 132.9, 132.7, 131.3, 125.6, 122.0, 118.8, 116.7, 101.8, 65.8, 58.9, 56.9, 55.5, 48.0, 46.9, 36.4, 26.8, 22.7, 17.1.
  • 42
    • 76449110697 scopus 로고    scopus 로고
    • note
    • 1H NMR (300 MHz).
  • 43
    • 76449094280 scopus 로고    scopus 로고
    • note
    • +-tBu, 14), 131 (100).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.