Journal
ORGANIC LETTERS
Volume 10, Issue 14, Pages 3045-3048Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol8010166
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An enantioselective formal synthesis of the alkaloid (-)-cephalotaxine has been completed, using an alkylidene carbene 1,5-CH insertion reaction as a key step to construct the spiro[4.4]azanonane core D/E-ring system. A Heck-type cyclization was used to close the tetrahydroazepine C-ring and a selective epoxidation-rearrangement sequence was used to elaborate the E-ring.
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