CYCLIZATION AND REARRANGEMENT OF DITERPENOIDS. VII. COMPOSITION OF THE HYDROCARBON FRACTION OF A MIXTURE OF THE PRODUCTS OF CYCLIZATION OF MANOOL AND SCLAREOL BY ORDINARY ACIDS

Article abstract of DOI:10.1007/BF00633391

The hydrocarbon fractions of the products of the cyclization of manool and sclareol by a mixture of conc. sulfuric and formic or acetic acids have been investigated.It has been established that they contain, in addition to the Δ^8/9-pimaradiene, Δ⁸⁽⁹⁾-isopimaradiene, roasadiene, and 13-epirosadiene identified previously, the tetracyclic hydrocarbons (1R, 2S, 7S, 11S, 12R, 13R)-2, 6, 6, 11, 13-pentamethyltetracyclo<10.2.1.0^1.10.0^2.7>pentadeca-9-ene and (1S, 2R, 11S, 12R, 1R)-2, 7, 7, 11, 15-pentamethyltetracyclo<10.2.1.0^2.11.0^3.8>pentadeca(8)-ene.