Abstract

A possible chiral synthetic route to the alkaloid (−)-dendrobine has been explored by employing intramolecular Pauson-Khand reaction as the key step. The cobalt complex generated from (S)-carvone yielded a single stereoisomer (10) on intramolecular Pauson-Khand reaction.The adduct 10 was transformed into decarboxy-7,9-dihydrodendrobine by a four-step reaction.

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