Two new synthetic routes to bioactive diterpene compound ( )-ferruginol starting from ( )-dehydroabietylamine were reported. Route 1: The reductive deamination of ( )-dehydroabietylamine with hydroxylamine-o-sulfonic acid and sodium hydroxide yielded dehydroabietane, followed by Friedel-Crafts acylation, Baeyer-Villiger oxidation and hydrolysis, gave ( )-ferruginol in 29.5% overall yield. Route 2: The reductive deamination of ( )-dehydroabietylamine, then reacted with phthaloyl peroxide to give ( )-ferruginol, overall yield 31.9%.