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Start Over Author "Davids, Timo" Publisher royal society of chemistry
1 results on '"Davids, Timo"'

1. Enzymatic cyclizations using laccases: Multiple bond formation between dihydroxybenzoic acid derivatives and aromatic aminesElectronic supplementary information (ESI) available: Experimental methods; 1H and 13C NMR spectra; HSQC, HMBC spectra and 1H–13C NMR correlations; retention time, UV-vis, and MS data. See DOI: 10.1039/b920081a

Author

Hahn, Veronika, Davids, Timo, Lalk, Michael, Schauer, Frieder, and Mikolasch, Annett

Subjects
*ENZYMATIC analysis, *RING formation (Chemistry), *LACCASE, *BENZOIC acid, *AROMATIC amines, *CHEMICAL bonds, *SUBSTITUTION reactions
Abstract

Oxidative C–N bond formation followed by cyclization of dihydroxybenzoic acid derivatives with aromatic and heteroaromatic amines was catalyzed in the presence of oxygen by laccases [E.C. 1.10.3.2] from the white rot fungi Pycnoporus cinnabarinusand Myceliophthora thermophila. The laccase-catalyzed formation of cycloheptenes, cyclooctenes, diazaspiro cyclohexenes, and phenazines was investigated for the first time with regard to the ring size and substituents of the aromatic amines as well as to the substitution patterns of the substrates. Differences to C–N bond formation without cyclization are discussed. [ABSTRACT FROM AUTHOR]

Published
2010
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