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Volumn 63, Issue 22, 1998, Pages 8062-8066

Lipase PS (Pseudomonas cepacia) mediated resolution of γ-substituted γ-((acetyloxy)methyl)-γ-butyrolactones: Complete stereochemical reversion by substituents

Author keywords

[No Author keywords available]

Indexed keywords


EID: 0000050692     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo981184r     Document Type: Article
Times cited : (31)

References (52)
  • 26
    • 33744877287 scopus 로고    scopus 로고
    • (5) Three-dimensional active site model were proposed on the basis of substrate mapping and molecular modeling for substrates
    • , vol.5
  • 29
    • 33744852118 scopus 로고    scopus 로고
    • (6) Preparation of cis-β-substituted-γ-(iodomethyl)-γ-butyrolactones
    • , vol.6
  • 32
    • 85088809629 scopus 로고    scopus 로고
    • note
    • 2O (10:1, v/v) under reflux. The ratios offrons and cis were obtained as 91:9, 94:6, and 96:4 for the substrate of β-methyl, ethyl, and phenyl-γ-iodomethyl-γ-butyrolactones, respectively. Details including the medium effect will be reported elsewhere.
  • 33
    • 85088810394 scopus 로고    scopus 로고
    • note
    • 3 for the substrates of 1a, 2a, and 4a.
  • 47
    • 33744870571 scopus 로고    scopus 로고
    • note
    • Substrates la and 2a,b were hydrolyzed with relatively poor enantiodifferentiation by porcine pancreas lipase in phosphate buffer. We could obtain (+)-lb, (+)-2b, and (+)-3b with 54, 23, and 29% ee's of products at 47,44, and 55% conversion. The absolute configurations of the γ-position for all three favorable substrate lactones are S regardless of substituents at the β-position.
  • 51
    • 33744844527 scopus 로고    scopus 로고
    • note
    • The minimum energy conformer generated by PM3 calculation with the program of ChemSD showed rigidity and informational similarity of the γ-lactone ring between irons- and cis-β-methyl-γ-((acetyloxy)methyl)-y-butyrolactones with opposite dihedral angles of γ-acetoxymethyl groups. However the dihedral angle of one substrate could be changed with an energy less than 1.7 kcal/mol.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.