Enantioselective First Total Syntheses of 2-(Formylamino)trachyopsane and ent-2-(Isocyano)trachyopsane via a Biomimetic Approach

A biomimetic rearrangement of an isotwistane to a tricyclo[4.3.1.0(3,8)]decane has been employed as the key step for the enantioselective first total syntheses of the marine sesquiterpenes 2-(formylamino)trachyopsane and ent-2-(isocyano)trachyopsanes ascertaining the biogenetic relationship between the marine sesquiterpenes neopupukeananes and trachyopsanes