Abstract

A set of nine 4-aminomethyl-7-alkoxycoumarin derivatives was synthesized and characterized as substrates for O-dealkylation by recombinant cytochrome P450 2D6, a major human enzyme involved in drug metabolism. Enzymatic O-dealkylation yields 7-hydroxycoumarins, which have useful fluorescence properties. The substrates, which differed in substitution at the amino and 7-hydroxy positions, varied in terms of catalytic efficiency of O-dealkylation and in their selectivity as substrates for cytochrome P450 2D6 in human liver microsomes. Several of the compounds are useful as cytochrome P450 2D6 substrates in single-phase, rapid-throughput assays.

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