Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 71, Issue 23, Pages 8884-8890Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo061652u
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An intramolecular Pd-catalyzed alpha-vinylation process is described. This cyclization has been employed for the enantiospecific total synthesis of gram quantities of both (+)-macroline 3 and the macroline equivalent 4. This sequence is compared to the enolate-driven cross-coupling process. The intermediate 4 was also converted into (-)-alstonerine 1 via modification of an intramolecular Tsuji-Wacker oxidation. This sequence resulted in an improved total synthesis of (-)-talcarpine 5 and (-)-anhydromacrosalhine-methine 6 as well.
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