Stereocontrolled Synthesis of (−)-Galanthamine
Organic Letters2007Vol. 9(10), pp. 1867–1869
Citations Over TimeTop 10% of 2007 papers
Abstract
An enantioselective synthesis of (-)-galanthamine has been realized in 11 linear steps starting from isovanillin. A Mitsunobu aryl ether forming reaction was used to assemble the galanthamine backbone, which was stitched together using enyne ring-closing metathesis, Heck, and N-alkylation reactions affording the tetracyclic ring system. Control of relative and absolute stereochemistry was derived from an easily accessible enantiomerically enriched propargylic alcohol 13.
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