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Volumn 45, Issue 41, 2004, Pages 7697-7701

Tandem enantioselective organo- and biocatalysis: A direct entry for the synthesis of enantiomerically pure aldols

Author keywords

Aldol; Catalysis; Kinetic resolutions; Lipase; Proline

Indexed keywords

ALCOHOL DERIVATIVE; KETONE DERIVATIVE; PROLINE; TRIACYLGLYCEROL LIPASE;

EID: 4544343483     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2004.08.079     Document Type: Article
Times cited : (48)

References (65)
  • 33
    • 4544253919 scopus 로고    scopus 로고
    • Asymmetric Synthesis of Optically Active Polycyclic Organic Compounds. German Patent DE 2102623, July 29, 1971
    • (a) Hajos, Z. G.; Parrish, D. R. Asymmetric Synthesis of Optically Active Polycyclic Organic Compounds. German Patent DE 2102623, July 29, 1971
    • Hajos, Z.G.1    Parrish, D.R.2
  • 35
    • 4544318551 scopus 로고    scopus 로고
    • Optically Active 1,5-Indanone and 1,6-Naphthalenedionene. German Patent DE 2014757, October 7, 1971
    • (c) Eder, U.; Sauer, G.; Wiechert, R. Optically Active 1,5-Indanone and 1,6-Naphthalenedionene. German Patent DE 2014757, October 7, 1971
    • Eder, U.1    Sauer, G.2    Wiechert, R.3
  • 58
  • 63
    • 4544231765 scopus 로고    scopus 로고
    • note
    • 4) and evaporated. Flash chromatography of the residue furnished hydroxy ketone 1c (0.124 g, 79%) with 77% ee as determined by chiral-phase HPLC analysis. Next, to a stirred mixture of hydroxy ketone 1c (38 mg, 0.182 mmol) and 4 Å molecular sieves in vinyl acetate (1 mL) was added PS-C Amano I (45 mg). The flask was evacuated and filled with argon three times before it was closed and the reaction left to stir at rt for 12 h to furnish acetate 2c in 76% yield with ee >99% as determined by chiral-phase HPLC analysis. No trace of the elimination product was detected by NMR or HPLC analyses
  • 64
    • 4544263904 scopus 로고    scopus 로고
    • note
    • The direct addition of vinyl acetate to the reaction mixture containing acetone significantly decreased the lipase-catalyzed kinetic resolution step
  • 65
    • 4544269160 scopus 로고    scopus 로고
    • note
    • 4) and evaporated and the residue purified by silica-gel column chromatography to provide hydroxy ketone ent-1c in 51% yield (0.11 g) with >99% ee


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.