908013-58-1Relevant academic research and scientific papers
Asymmetric Synthesis of amines through rhodium-catalyzed C-H amination with sulfonimidoylnitrenes
Darses, Benjamin,Jarvis, Amandag.,Mafroud, Abdel-Kader,Estenne-Bouhtou, Genevieve,Dargazanli, Gihad,Dauban, Philippe
, p. 2079 - 2087 (2013/08/23)
An efficient asymmetric C-H amination of benzylic and allylic substrates, as well as of adamantane derivatives, through catalytic C-H insertion of a chiral nitrene is reported. The reaction involves a chiral rhodium(II) complex, an iodine(III) oxidant, an
Toward a synthetically useful stereoselective C-H amination of hydrocarbons
Liang, Chungen,Collet, Florence,Robert-Peillard, Fabien,Mueller, Paul,Dodd, Robert H.,Dauban, Philippe
, p. 343 - 350 (2008/10/09)
Reaction between a sulfur(VI) compound and an iodine(III) oxidant in the presence of a catalytic quantity (≤3 mol %) of a rhodium(II) catalyst leads to the formation of a chiral metallanitrene of unprecedented reactivity. The latter allows intermolecular C-H amination to proceed in very high yields up to 92% and excellent diastereoselectivities up to 99% with C-H bond containing starting materials as the limiting component. The scope of this C-H functionalization includes benzylic and allylic substrates as well as alkanes. Secondary positions react preferentially, but insertion into activated primary C-H bonds or sterically accessible tertiary sites is also possible. Cooperative effects between the nitrene precursor and the chiral catalyst at the origin of these good results have also been applied to kinetic resolution of racemic sulfonimidamide. This methodology paves the way to the use of Csp3-H bonds as synthetic precursors for the introduction of a nitrogen functionality into selected positions.
