Abstract
The quinazolinocarboline alkaloids including rutaecarpine ( 1a), euxylophoricine A ( 1b), and euxylophoricine C ( 1c) have been synthesized efficiently from the ring opened β-carboline derivative as key intermediate by a one-pot reductive-cyclization reaction. The key intermediate was prepared from tryptamine ( 6) following Bischler–Napieralski cyclization, benzoylation, and oxidative cleavage of the exocyclic double bond.
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