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).
Synthesis of Optically Active β- or γ-Alkyl-Substituted Alcohols through Copper-Catalyzed Asymmetric Allylic Alkylation with Organolithium Reagents
作者:Sureshbabu Guduguntla、Martín Fañanás-Mastral、Ben L. Feringa
DOI:10.1021/jo401536u
日期:2013.9.6
An efficient one-pot synthesis of optically active β-alkyl-substituted alcohols through a tandem copper-catalyzedasymmetricallylicalkylation (AAA) with organolithium reagents and reductive ozonolysis is presented. Furthermore, hydroboration–oxidation following the Cu-catalyzed AAA leads to the corresponding homochiral γ-alkyl-substituted alcohols.
Total syntheses of close analogues of the immunosuppressant FK506
作者:Mark J Batchelor、Roger J Gillespie、Julian MC Golec、Charles JR Hedgecock、Stuart D Jones、Robert Murdoch
DOI:10.1016/s0040-4020(01)80796-1
日期:1994.1
The totalsynthesis of an analogue of FK506, in which the substituted cyclohexyl residue at C28 has been replaced by a phenyl group, is described. This synthesis demonstrates (i) the successful application of new methodology for the introduction of the masked tricarbonyl grouping (C8-C10), and (ii) new synthetic routes to the (C10-C19) and (C22-C26) regions.
Synthesis of dolichol-type (S)-hexa- and (S)-heptaprenols
作者:V. V. Veselovskii、V. A. Koptenkova、M. A. Novikova、A. M. Moiseenkov
DOI:10.1007/bf00957785
日期:1989.9
Probing<i>o</i>-Diphenylphosphanyl Benzoate (<i>o</i>-DPPB)-Directed CC Bond Formation: Total Synthesis of Dictyostatin
作者:Sebastian Wünsch、Bernhard Breit
DOI:10.1002/chem.201406252
日期:2015.2.2
Herein, we report a robust totalsynthesis of dictyostatin. This polyketide natural product has attracted much attention because of its impressive antiproliferative activity against several human cancer‐cell lines. We accomplished its synthesis in a highly convergent manner from three fragments of equal complexity, which were prepared on multigram scale. The southern and northwestern subunits were