The conversion of labdadienols into pimara- and rosa-dienes
Abstract
Manool (1a), 13-epi-manool (1b), and the related alcohols (5) and (6) have been converted by acid via the pimaradienes (2a and b) into rosadienes (3a and b). Prolonged treatment with acid leads to abieta-rosadienes such as (25).