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
A short and efficient transformation of rhamnose into activated daunosamine, acosamine, ristosamine and epi-daunosamine derivatives, and synthesis of an anthracycline antibiotic acosaminyl-ε-iso-rhodomycinone
constituents of most anthracycline antitumour antibiotics. For an investigation of structure-activity relationships, the four diastereomeric amino sugars daunosamine, acosamine, ristosamine, and epi-daunosamine were synthesised in short and efficient routes starting from commercially available rhamnose. Several glycosyl donors were provided and their use was exemplified in the synthesis of acosaminyl-e