Zizaene and cedrene sesquiterpenes. Novel synthesis of tricyclic intermediates for their preparation
作者:Kakumanu Pramod、G. S. R. Subba Rao
DOI:10.1039/c39820000762
日期:——
The tricyclic enone (8), conveniently prepared from the diene (5)via the adduct (7), afforded the endo-and exo-alcohols (9) whose toluene-p-sulphonates (10) were readily converted into the tricyclic ketones (11) and (12), thus paving the way for a new total synthesis of racemic zizaene (1) and of racemic cedrene (2) respectively.
由二烯(5)经由加合物(7)方便地制备的三环烯酮(8)提供了内-和外-醇(9),其甲苯-对-磺酸酯(10)易于转化为三环酮(11)和(12),因此分别为新的外消旋齐氮烯(1)和外消旋雪松烯(2)的全合成铺平了道路。