Copper-mediated C(sp2)–H amination using TMSN3 as a nitrogen source: redox-neutral access to primary anilines

A Cu-mediated C–H amination for the preparation of primary anilines under redox neutral conditions is developed.

Room-temperature Cu(ii)-catalyzed aromatic C–H azidation for the synthesis of ortho-azido anilines with excellent regioselectivity

An efficient synthesis of ortho-aniline derivatives through aromatic C–H azidation catalyzed by Cu(OAc)₂ have been disclosed. The amino group plays an ortho-directing effect in the azidation reactions, regiospecifically affording the mono-azidated derivative as the sole products.

Rh(III)-catalyzed C-H amidation with N-hydroxycarbamates: a new entry to N-carbamate-protected arylamines

An unprecedented Rh(III)-catalyzed direct intermolecular C-H amidation with N-hydroxycarbamates has been developed. Different directing groups, such as pyridine, pyrimidine, pyrazole, and N-OMe oxime, can be employed in this C-H amidation process, providing valuable N-carbamate-protected arylamines (e.g., Cbz, Moz, Ac, Boc, and Fmoc). More importantly, this process may afford a new avenue for intermolecular C-H amidation where readily available N-hydroxycarbamates can be used as the nitrogen source.

Rhodium-catalyzed direct addition of aryl C-H bonds to nitrosobenzenes at room temperature

An unprecedented Rh-catalyzed direct addition of aryl C-H bonds to nitrosobenzenes has been developed under very mild reaction conditions (room temperature). The reaction is highly step-, atom-, and redox-economic and compatible with air and water to N-selectively provide a variety of N-diarylhydroxylamines in good to excellent yields. More importantly, this process may provide a new direction for C-N bond formation through direct C(sp(2))-H functionalization.