PT - JOURNAL ARTICLE AU - PATRICK J. MURPHY AU - JOHN R. BERNSTEIN AU - ROBERT E. MCMAHON TI - The Formation of Catechols by Consecutive Hydroxylations: A Study of the Microsomal Hydroxylation of Butamoxane DP - 1974 Jul 01 TA - Molecular Pharmacology PG - 634--639 VI - 10 IP - 4 4099 - http://molpharm.aspetjournals.org/content/10/4/634.short 4100 - http://molpharm.aspetjournals.org/content/10/4/634.full SO - Mol Pharmacol1974 Jul 01; 10 AB - The hydroxylation of butamoxane [2-(butylaminomethyl)-1, 4-benzodioxane] both in vivo and in vitro by an enzyme derived from rat liver yields a mixture of 6-hydroxybutamoxane and 7-hydroxybutamoxane in a ratio of approximately 2:1. In addition, the microsomal oxidation of butamoxane in vitro yields the catechol 6, 7-dihydroxybutamoxane. This same catechol is produced by the hydroxylation of either 6-hydroxybutamoxane or 7-hydroxybutamoxane. A series of 18O studies are described which support the concept that 6,7-dihydroxybutamoxane is formed via two consecutive hydroxylations rather than via a dihydrodiol or an endoperoxide.