Enantioselective Synthesis of the Predominant AB Ring System of the <i>Schisandra</i> Nortriterpenoid Natural Products
作者:Birgit Gockel、Shermin S. Goh、Emma J. Puttock、Hannah Baars、Guilhem Chaubet、Edward A. Anderson
DOI:10.1021/ol502027m
日期:2014.9.5
An enantioselectivesynthesis of the AB ring system common to the majority of the Schisandra nortriterpenoid natural products is reported. Key steps include a stereospecific ring opening of a trisubstitutedepoxide and the use of a β-lactone to enable installation of the gem-dimethyl functionality of the B ring. An acetalization strategy played a key role in a late-stage biomimetic AB ring bicyclization