Total Synthesis of the Postulated Structure of Fulicineroside
作者:Ruben Bartholomäus、Fabian Dommershausen、Markus Thiele、Narayan S. Karanjule、Klaus Harms、Ulrich Koert
DOI:10.1002/chem.201204545
日期:2013.6.3
A totalsynthesis of the proposed structures of fulicineroside and its aglycone fulicinerine is reported. The tetrasubstituted dibenzofuran substructure was accessible either through a Pd‐mediated ortho‐metalation or by an Ir‐catalyzed meta‐borylation. The synthesis of the β,β,α‐linked trisaccharide consisting of D‐olivose, L‐rhodinose, and L‐rhamnose was challenged by the unprecedented β‐linked rhodinose
The Tandem Ring‐Closing Metathesis–Isomerization Approach to 6‐Deoxyglycals
作者:Bernd Schmidt、Anne Biernat
DOI:10.1002/chem.200800567
日期:2008.7.7
synthesized de novo as single isomers starting from ethyl lactate by using the tandem RCM-isomerization reaction as the key step. Different relative configurations become accessible by addition of vinyl- or allyl-metal compounds to protected lactaldehydes under Cram-chelate or Felkin-Anh control. The concept is exemplified for glycals of L-rhodinose and L-amicetose, as well as for ring-expanded non-natural