Synthesis of N-Pyridyl Hydroxylamines via Copper-Catalyzed Cross-Coupling
作者:Carilyn Torruellas、Fu-Lian Hsu、Andrew J. Walz
DOI:10.1055/s-0037-1611836
日期:2019.8
N-Pyridyl hydroxylamine derivatives were prepared via copper-catalyzed cross-coupling of orthogonally functionalized hydroxylamines with iodopyridines. Various amino- and hydroxyl-protecting groups were tolerated. A total of 20 examples were synthesized in 28–90% yield. N-Pyridyl hydroxylamine derivatives were prepared via copper-catalyzed cross-coupling of orthogonally functionalized hydroxylamines with
Hydrazines and hydroxylamines have been found to be excellent nucleophiles for the palladium-catalyzed dynamic asymmetric allylic amination of vinyl epoxide, with good yields and enantioselectivities of up to 97% ee. This method is applicable to acyclic and heterocyclic amines and was applied toward a five-step synthesis of (R)-piperazic acid.