Novel heterocyclic betaines relevant to the mechanism of tyrosinase-catalysed oxidation of phenols

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John Clews, Christopher A. Ramsden, John Clews, Christopher J. Cooksey, Peter J. Garratt, Edward J. Land and Patrick A. Riley


Abstract

Betaines formed by dianisyltellurium oxide oxidation of N,N-dialkyldopamines are identical to the products formed by tyrosinase oxidation of N,N-dialkyltyramines or N,N-dialkyldopamines and provide evidence that tyrosinase does not act as a tyrosine hydroxylase; oxidations of higher homologues of N,N-diethyldopamine are also described.


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