10.1021/ol035322x.s001 Kay M. Brummond Kay M. Brummond Dong Gao Dong Gao Unique Strategy for the Assembly of the Carbon Skeleton of Guanacastepene A Using an Allenic Pauson−Khand-Type Reaction American Chemical Society 2003 tricyclic framework allenic Carbon Skeleton functionalized tricyclic core novel strategy Assembly Guanacastepene approach rhodium synthesis Pauson guanacastepene Unique Strategy formation intially Allenic 2003-08-16 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Unique_Strategy_for_the_Assembly_of_the_Carbon_Skeleton_of_Guanacastepene_A_Using_an_Allenic_Pauson_Khand-Type_Reaction/3748158 An approach to the highly functionalized tricyclic core of guanacastepene A has been developed using a rhodium(I)-catalyzed allenic Pauson−Khand reaction. This approach constitutes a conceptually novel strategy for the synthesis of this tricyclic framework, whereby the six-membered ring is formed intially followed by simultaneous formation of the five- and seven-membered rings.