Enamides Accessed from Aminothioesters via a Pd(0)-Catalyzed Decarbonylative/β-Hydride Elimination Sequence
作者:Geanna K. Min、Dácil Hernández、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/ol101620r
日期:2010.11.5
A facile synthesis of various enamides from aminothioesters via a palladium(0)-catalyzed decarbonylation/β-hydride elimination is reported. This protocol was applied to mercaptopyridyl C-terminal modified peptides for the generation of enamides without epimerization at stereogenic centers.
Decarboxylative Elimination of <i>N</i>-Acyl Amino Acids via Photoredox/Cobalt Dual Catalysis
作者:Kaitie C. Cartwright、Jon A. Tunge
DOI:10.1021/acscatal.8b03282
日期:2018.12.7
A dual-catalytic strategy for the synthesis of enamides and enecarbamates directly from easily accessible and inexpensive amino acids has been realized. This mild and efficient protocol makes use of an organic photoredox catalyst and a cobaloxime catalyst to achieve decarboxylative elimination using hydrogen evolution to drive the oxidation. Thus, the reaction occurs without a stoichiometric oxidant
Photoinduced Kochi Decarboxylative Elimination for the Synthesis of Enamides and Enecarbamates from <i>N</i>-Acyl Amino Acids
作者:Kaitie C. Cartwright、Simon B. Lang、Jon A. Tunge
DOI:10.1021/acs.joc.9b00167
日期:2019.3.1
accessible N-acylaminoacids to provide enamide and enecarbamate building blocks has been realized through the combination of an organophotoredox catalyst and copper acetate as the terminal oxidant. This operationally simple process utilizes inexpensive and readily available reagents without preactivation of the carboxylic acid. Enamides and enecarbamates are now accessible directly from N-acylamino acids
The synthetic utility of quinone imine ketals in the context of asymmetriccatalysis was disclosed for the first time. By expanding the utility of chiral Brønsted acid catalysis to the electrophilic activation of quinone imine ketals, we succeeded in the development of highly enantioselective arylation of encarbamates to give α-amino-β-aryl ethers wherein quinone imine ketals act as functionalized aromatic