Synthesis of pyrazole (hemi)aminals via the cleavage of saturated aliphatic ether C–O bonds in the presence of ferric halides

The discovery of reactions utilizing previously considered inert functional groups opens up new paths towards the synthesis of desired products.

Copper-Catalyzed Oxidative C-H Amination of Tetrahydrofuran with Indole/Carbazole Derivatives

A simple α-C-H amination of cyclic ether with indole/carbazole derivatives has been accomplished by employing copper(II) chloride/bipy as the catalyst system. In the presence of the di-tert-butyl peroxide oxidant, cyclic ethers such as tetrahydrofuran, 1,4-dioxane, and tetrahydropyran successfully undergo C-H/N-H cross dehydrogenative coupling (CDC) with various carbazole or indole derivatives in good-to-excellent yields.