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Volumn 65, Issue 18, 2000, Pages 5451-5459

Enzymatic kinetic resolution of piperidine atropisomers: Synthesis of a key intermediate of the farnesyl protein transferase inhibitor, SCH66336

Author keywords

[No Author keywords available]

Indexed keywords

GUANOSINE DIPHOSPHATE; GUANOSINE TRIPHOSPHATASE; GUANOSINE TRIPHOSPHATE; LONAFARNIB; LORATADINE; PIPERIDINE DERIVATIVE; PROTEIN FARNESYLTRANSFERASE INHIBITOR; RAS PROTEIN; SOLVENT; TRIACYLGLYCEROL LIPASE;

EID: 0033828991     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo991513v     Document Type: Article
Times cited : (57)

References (49)
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    • manuscript in preparation
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    • Since this behavior results from rotation about two bonds instead of one, it is not atropisomerism as strictly defined. Nevertheless, the more familiar term will be used: Oki, M. Topics in Stereochemistry; John Wiley and Sons: New York, 1983; Vol. 14, pp 1-81.
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    • note
    • The moderate selectivity of TFEOBOC suggested the enzymatic introduction of the Cbz group followed by catalytic hydrogenation to remove the Cbz group and reduce the olefin to yield (R)-(+)-5 directly. However transfer hydrogenation of (±)-4 with cyclohexane/10% Pd/C in refluxing EtOH resulted in complete removal of the 3-Br substituent, with the olefin remaining intact.
  • 33
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    • U.S. Patent 5,756,830, 1998
    • Increasing the size of the acylating agent from vinyl acetate to isobutyric anhydride resulted in a dramatic increase in the selectivity of a Novozyme 435 catalyzed desymmetrization of a prochiral 1,3-diol. See: (a) Nielsen, C. M.; Sudhakar, A. U.S. Patent 5,756,830, 1998. (b) Morgan, B.; Dodds, D. R.; Zaks, A.; Andrews, D. R.; Klesse, R. J. Org. Chem. 1997, 62, 7736-7743.
    • Nielsen, C.M.1    Sudhakar, A.2
  • 34
    • 0030831509 scopus 로고    scopus 로고
    • Increasing the size of the acylating agent from vinyl acetate to isobutyric anhydride resulted in a dramatic increase in the selectivity of a Novozyme 435 catalyzed desymmetrization of a prochiral 1,3-diol. See: (a) Nielsen, C. M.; Sudhakar, A. U.S. Patent 5,756,830, 1998. (b) Morgan, B.; Dodds, D. R.; Zaks, A.; Andrews, D. R.; Klesse, R. J. Org. Chem. 1997, 62, 7736-7743.
    • (1997) J. Org. Chem. , vol.62 , pp. 7736-7743
    • Morgan, B.1    Dodds, D.R.2    Zaks, A.3    Andrews, D.R.4    Klesse, R.5
  • 36
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    • note
    • Vinyl isobutyrate resulted in decomposition of starting material, whereas acetone oxime isobutyrate and isobutyric anhydride showed little or no selectivity at low temperature.
  • 37
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    • note
    • Sawa is a supplier of the Toyobo enzymes. LIP-300 and LIP-301 are the same enzyme; the different designations are for different pricing schedules.
  • 39
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    • Halling, P. J. Biotech. Tech. 1992, 6, 271-276. Hogberg, H.-E.; Edlund, H.; Berglund, P.; Hedenstrom, E. Tetrahedron: Asymm. 1993, 4, 2123-2126.
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  • 41
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    • note
    • Azeotropic distillation of the substrate solution in the presence of the enzyme resulted in ∼10% lowered conversion, but without diminution of enzyme selectivity.
  • 43
    • 0342828526 scopus 로고    scopus 로고
    • note
    • At the concentrations shown in Figure 5, to produce 0.5 equiv of isobutyric acid by hydrolysis of TFEOiBu would require 486 ppm water.
  • 48
    • 0343263374 scopus 로고    scopus 로고
    • note
    • A 5:1 solvent/(-)-4 mixture was maintained at reflux, or else heated to 240 °C over a period of 2.5 h, maintained at 240 °C for 2 h, then cooled, and subjected to a standard workup. Solvents (bp, °C) were Decalin (189-191), diethylbenzene (180-182), di(ethyleneglycol) dibutyl ether (256), heptamethylnonane (240), hexadecane (287), N-methylacetamide (204-206), phenyl ether (259).
  • 49
    • 0343263375 scopus 로고    scopus 로고
    • note
    • Conditions: (±)-5, 5 mg; isopropenyl acetate, 10 equiv; EtOAc or TBME, 2 mL; room temperature; 250 rpm.


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