Synthetic Studies toward Jatrophane Diterpenes from <i>Euphorbia characias</i>. Enantioselective Synthesis of (−)-15-<i>O</i>-Acetyl-3-<i>O</i>-propionyl-17-norcharaciol
作者:Hannes Helmboldt、Martin Hiersemann
DOI:10.1021/jo802581g
日期:2009.2.20
The enantioselective synthesis of (+)-17-norcharaciol is described. An uncatalyzed intramolecular carbonyl-ene reaction and a ring-closing metathesis were used as key C/C-connecting transformations to assemble the trans-bicyclo[10.3.0]pentadecane norditerpenoid core. We also report the evolution of our synthetic strategy toward the fully substituted characiol skeleton and the experiences from this venture.