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Volumn 74, Issue 19, 2009, Pages 7230-7237

The laccase-catalyzed domino reaction between catechols and heterocyclic 1,3-dicarbonyls and theunambiguous structure elucidation of the products by NMR spectroscopy and X-ray crystal structure analysis

Author keywords

[No Author keywords available]

Indexed keywords

BARBITURIC ACID; CATALYZED REACTIONS; CHEMICAL EQUATIONS; DICARBONYLS; DOMINO REACTIONS; LACCASES; NMR SPECTROSCOPY; PYRIDINONES; REACTION PRODUCTS; SPECTROSCOPIC METHOD; STRUCTURE ELUCIDATION; X-RAY CRYSTAL STRUCTURE ANALYSIS;

EID: 70349598538     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo9011915     Document Type: Article
Times cited : (64)

References (120)
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    • Laccase activity (AbL) was determined according to a modified procedure taken from
    • Laccase activity (AbL) was determined according to a modified procedure taken from: Felici, M.; Artemi, F.; Luna, M.; Speranza, M. J. Chromatogr. 1985, 320, 435.
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    • A1.02mMsolution of catechol (0.45 mL) in 0.2Mphosphate buffer (pH=6.0) was diluted with 0.2 M phosphate buffer (2.5 mL, pH=6.0) and treated with a solution of laccase from A. bisporus (AbL) in the same buffer (0.2 mL). The change in absorption was followed via UV spectroscopy (λ=390 nm). 1 U is defined as the amount of the enzyme that catalyzes the conversion of 1 μmol of catechol per minute by pH 6.0 and 25 °C Nomenclature Committee of the International Union of Biochemistry.
    • Land, E. J. J. Chem. Soc., Faraday Trans. 1993, 89, 803. A1.02mMsolution of catechol (0.45 mL) in 0.2Mphosphate buffer (pH=6.0) was diluted with 0.2 M phosphate buffer (2.5 mL, pH=6.0) and treated with a solution of laccase from A. bisporus (AbL) in the same buffer (0.2 mL). The change in absorption was followed via UV spectroscopy (λ=390 nm). 1 U is defined as the amount of the enzyme that catalyzes the conversion of 1 μmol of catechol per minute by pH 6.0 and 25 °C (Nomenclature Committee of the International Union of Biochemistry.
    • (1993) J. Chem. Soc., Faraday Trans. , vol.89 , pp. 803
    • Land, E.J.1
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    • The activity of laccase amounted to 3.11 U/mg.
    • Eur. J. Biochem. 1979, 97, 319). The activity of laccase amounted to 3.11 U/mg.
    • (1979) Eur. J. Biochem. , vol.97 , pp. 319
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    • Laccase activity was determined according to a modified procedure taken from: A 0.91 mM solution of ABTS (0.3 mL) in 0.2 M phosphate buffer (pH = 6.0) was diluted with 0.2 M phosphate buffer (2.6 mL, pH = 6.0) and treated with a solution of laccase from A. bisporus (AbL) in the same buffer (0.1 mL). The change in absorption was followed via UV spectroscopy (λ = 414 nm). For AbL 1 U is defined as the amount of the enzyme that catalyzes the conversion of 1 μmol of ABTS per minute by pH 6.0 and 25 °C. The activity of AbL with ABTS as the substrate amounted to 0.61 U/mg. For TvF 1 U is defined as the amount of the enzyme that catalyzes the conversion of 1 μmol of ABTS per minute by pH 4.38 and 25 °C. For Lccβ 1 U is defined as the amount of the enzyme that catalyzes the conversion of 1 μmol of ABTS per minute by pH 5.0 and 25 °C.
    • Laccase activity was determined according to a modified procedure taken from: Nicotra, S.; Intra, A.; Ottolina, G.; Riva, S.; Danieli, B. Tetrahedron: Asymmetry 2004, 15, 2927. A 0.91 mM solution of ABTS (0.3 mL) in 0.2 M phosphate buffer (pH = 6.0) was diluted with 0.2 M phosphate buffer (2.6 mL, pH = 6.0) and treated with a solution of laccase from A. bisporus (AbL) in the same buffer (0.1 mL). The change in absorption was followed via UV spectroscopy (λ = 414 nm). For AbL 1 U is defined as the amount of the enzyme that catalyzes the conversion of 1 μmol of ABTS per minute by pH 6.0 and 25 °C. The activity of AbL with ABTS as the substrate amounted to 0.61 U/mg. For TvF 1 U is defined as the amount of the enzyme that catalyzes the conversion of 1 μmol of ABTS per minute by pH 4.38 and 25 °C. For Lccβ 1 U is defined as the amount of the enzyme that catalyzes the conversion of 1 μmol of ABTS per minute by pH 5.0 and 25 °C.
    • (2004) Tetrahedron: Asymmetry , vol.15 , pp. 2927
    • Nicotra, S.1    Intra, A.2    Ottolina, G.3    Riva, S.4    Danieli, B.5
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    • (13f) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from the Cambridge Crystallographic Data Centre via
    • (a) CCDC-714093 (13f) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from the Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data-request/cif.


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