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 Chemjournal_title
Journal of medicinal chemistryauthors
Cashman JRdoi
10.1021/jm00401a032subject
Has Abstractpub_date
1988-06-01 00:00:00pages
1258-61issue
6eissn
0022-2623issn
1520-4804journal_volume
31pub_type
杂志文章abstract::Antagonism of mercaptopropionic acid (MPA) induced convulsions, reflecting a GABAergic mechanism, was observed in a series of 1-aryl-3-(aminoalkylidene)oxindoles. Optimal MPA antagonism was associated with 3-halo, 3-alkyl, and/or 4-alkoxy substituents in the pendant aryl ring and with (dimethylamino)methylene, 1-(dime...
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