Abstract
The reaction of o-toluamide anions, derived from the (S)-(–)- and (R)-(+)-1-phenylethylamine, with 6,7-dimethoxy-3,4-dihydroisoquinoline gives (13aS)-(–)- and (13aR)-(+)-8-oxoprotoberberine, respectively, with enantiomeric excesses >96%.
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