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Volumn 128, Issue 13, 2006, Pages 4481-4486

Kinetic resolution displaying zeroth order dependence on substrate consumption: Copper-catalyzed asymmetric alcoholysis of azlactones

Author keywords

[No Author keywords available]

Indexed keywords

ALCOHOLS; CARBOXYLIC ACIDS; CATALYSIS; CATALYST SELECTIVITY; COPPER; REACTION KINETICS; SUBSTRATES;

EID: 33645470534     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja058112j     Document Type: Article
Times cited : (32)

References (68)
  • 15
    • 0035953045 scopus 로고    scopus 로고
    • (i) Kagan, H. B. Tetrahedron 2001, 57, 2449-2468.
    • (2001) Tetrahedron , vol.57 , pp. 2449-2468
    • Kagan, H.B.1
  • 22
    • 33645473767 scopus 로고    scopus 로고
    • note
    • Quantitative analyses of special cases of kinetic resolution have been made: enzymatic reaction,5 dynamic kinetic resolution,6 and nonlinear effect in kinetic resolution.7
  • 32
    • 33645465062 scopus 로고    scopus 로고
    • note
    • rel = 10, in graph (a), ee is 81.8% at 50% convn and then reaches 100% at 55% convn. In graph (b), 67.0%. at 50% convn and 90% ee is achieved at 62.1% convn. In graph (c), 51.9% at 50% convn and even at 100% convn, the ee value is 81.8%.
  • 33
    • 33645469176 scopus 로고    scopus 로고
    • note
    • In graph (d), edged corners at the point of complete conversion of fast-reacting enantiomer will be rounded off to a smooth line in the real reactions because that will not follow the zeroth-order kinetics perfectly.
  • 34
    • 33645471282 scopus 로고    scopus 로고
    • note
    • |d that the kinetic order in a substrate can shift from zerothto first-order as the substrate concentration decreases in the case of saturation kinetics.
  • 35
    • 22744443220 scopus 로고    scopus 로고
    • Blackmond demonstrated change of the reaction order from nearly zeroth to more positive order during the reaction progress. Blackmond. D. G. Angew. Chem., Int. Ed. 2005, 44, 4302-4320.
    • (2005) Angew. Chem., Int. Ed. , vol.44 , pp. 4302-4320
    • Blackmond, D.G.1
  • 41
    • 33645466734 scopus 로고    scopus 로고
    • note
    • Jacobsen pointed out in a review1d "the rate laws for synthetically useful kinetic resolutions are almost never determined, but it is generally just assumed that the reactions are first-order in substrate and that eqs 2 and 5 are applicable". More recently, Vedejs noted as well.1a
  • 42
    • 0027493117 scopus 로고
    • rel values (calculated as first order) increased with the increase of the reaction conversion. We proposed the reaction follows zeroth-order or fractional order that brought about better results than expected as first-order reaction. Faller, J. W.; Tokunaga, M. Tetrahedron Lett. 1993, 34, 7359-7362.
    • (1993) Tetrahedron Lett. , vol.34 , pp. 7359-7362
    • Faller, J.W.1    Tokunaga, M.2
  • 65
    • 33645463090 scopus 로고    scopus 로고
    • note
    • With use of methanol as reagent, 94% ee of 1b and 24% ee of alcoholyzed product were obtained at 22 h (80% convn).
  • 66
    • 33645470519 scopus 로고    scopus 로고
    • note
    • rel value, determination of conversion should be performed carefully.1a,d
  • 67
    • 33645467250 scopus 로고    scopus 로고
    • note
    • rel values of zeroth- and first-order kinetic resolution were calculated both from theoretical and experimental conversion values using eqs 1, 2, 4, and 5 and are listed as 3 digit numbers.
  • 68
    • 33645467989 scopus 로고    scopus 로고
    • note
    • 0) = -kt) for 1b (Table 1, entries 2-5), 1f (entries 12-15), and 1g (entries 16-19) were well fitted below 50% convn (25% convn based on alcohol), 11 (entries 24-27) was moderately fitted, but 1c (entries 6-9) was not fitted (see Supporting Information Figure S-4).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.