Abstract
The reaction of the 9-fluoroacridizinium (9-fluorobenzo[b]quinolizinium) or the 9-aminoacridizinium (9-aminobenzo[b]quinolizinium) ion with primary alkyl amines gives with high diastereoselectivity 6-amino-3,4-dihydroisoquinolinium derivatives as main products, which exhibit pronounced absorption and fluorescence properties. It is proposed that the reaction proceeds via a nucleophilic ring-opening followed by an aza Diels-Alder reaction.
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