A Unified Strategy for the Stereospecific Construction of Propionates and Acetate-Propionates Relying on a Directed Allylic Substitution
作者:Tomislav Reiss、Bernhard Breit
DOI:10.1002/chem.200901064
日期:2009.6.22
Flexible friends: A new strategy that relies on o‐DPPB‐directedallylicsubstitution has been implemented for the flexible and stereospecificconstruction of major polyketide and isoprenoid structural elements (see scheme; o‐DPPB=ortho‐diphenylphosphanyl benzoate; PG=protecting group).
Total Synthesis of (+)-Bourgeanic Acid Utilizing <i>o</i>-DPPB-Directed Allylic Substitution
作者:Tomislav Reiss、Bernhard Breit
DOI:10.1021/ol9011635
日期:2009.8.6
The lichen metabolite (+)-bourgeanic acid has been synthesized utilizing a new strategy for the construction of propionate motifs relying on the o-DPPB-directed copper-mediated allylicsubstitution. This synthesis features the o-DPPB-directed allylicsubstitution employing a chiral Grignard reagent, Sharpless asymmetric epoxidation, and reductive epoxide ring opening with a higher order dimethylcuprate
Enantioselective Total Synthesis and Determination of Absolute Configuration of Vittatalactone
作者:Yvonne Schmidt、Bernhard Breit
DOI:10.1021/ol901591t
日期:2009.11.5
The first asymmetric total synthesis of vittatalactone features the divergent synthesis of two diastereomers to assign the absoluteconfiguration of the natural product. Its consecutive propionate and deoxypropionate stereogenic centers are established by enantioselective o-DPPB directed allylic substitution.