Facile N-oxygenation of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine by the flavin-containing monooxygenase. A convenient synthesis of tritiated [methyl-3H]-4-phenyl-2,3-dihydropyridinium species.

Abstract:

:A rapid, efficient procedure useful for the radiosynthesis of [Me-3H]-MPDP+ ([methyl-3H]-4-phenyl-2,3-dihydropyridinium species) is described. Hog liver microsomes or the highly purified flavin-containing monooxygenase from hog liver quantitatively biotransforms [Me-3H]-MPTP to its corresponding radiolabeled N-oxide. For the small-scale synthesis required for radiolabeling procedures, this enzymatic process is superior to H2O2-mediated N-oxygenation of MPTP. In the presence of 0.5 mM NADPH, 4.5 mM n-octylamine, and 2 microCi [Me-3H]-MPTP, the only product detected in extracts from incubations performed with hog liver microsomes or purified hog liver flavin-containing monooxygenase is [Me-3H]-MPTP N-oxide. [Me-3H]-MPTP N-oxide is almost completely converted to [Me-3H]-MPDP+ by the action of trifluoroacetic anhydride. This procedure has the advantage of using a commercially available tritiated starting material, efficient transformations, and easily accomplished purification to afford a rapid synthesis of [Me-3H]-MPDP+.

journal_name

J Med Chem

authors

Cashman JR

doi

10.1021/jm00401a032

subject

Has Abstract

pub_date

1988-06-01 00:00:00

pages

1258-61

issue

6

eissn

0022-2623

issn

1520-4804

journal_volume

31

pub_type

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