CYCLIZATION MECHANISM OF TRANS-β-MONOCYCLOHOMOFARNESIC ACID AND RELATED COMPOUNDS
Cyclization of trans-β-monocyclohomofarnesic acid and the related compounds was closely examined in order to elucidate the reaction mechanism. It was revealed that the cyclization of trans-β-monocyclohomofarnesic acid proceeds via formation of the cationic intermediate followed by concerted lactonization to give trans-anti-trans norambreinolide stereoselectively.