was developed to prepare the tricycle diterpene intermediates 1–3 starting from commercially available (−)-sclareol. This improved approach involving four-step reactions provides large-scale (30–40 g) methyl ent-isocopalate in 61% overall yield, which could supply sufficient material for the synthesis of marine natural products containing tricyclic diterpenes.
The structures of tricyclic terpenoid carboxylic acids and their parent alkanes in the Alberta oil sands
作者:Terry D. Cyr、Otto P. Strausz
DOI:10.1039/c39830001028
日期:——
A series of novel tricyclicterpenoidcarboxylicacids were isolated from several Albertaoil sand deposits; their structures and those of a related series of tricyclicterpenoidalkanes were elucidated via an unambiguous synthesis from manool.