Tandem Use of Cobalt-Mediated Reactions to Synthesize (+)-Epoxydictymene, a Diterpene Containing a <i>Trans</i>-Fused 5−5 Ring System
作者:Timothy F. Jamison、Soroosh Shambayati、William E. Crowe、Stuart L. Schreiber
DOI:10.1021/ja970022u
日期:1997.5.1
(+)-epoxydictymene has been synthesized in 20 steps using the asymmetry of (R)-pulegone and several substrate-controlled diastereoselective reactions to prepare the natural product in its natural configuration. Three of the four rings were assembled with two consecutive intramolecular reactions involving dicobalt hexacarbonyl complexes of alkynes: a Lewisacid-promoted Nicholas reaction and a Pauson−Khand reaction