Palladium-catalyzed oxidative deacetonative coupling of 4-aryl-2-methyl-3-butyn-2-ols with H-phosphonates

A new and generally practical synthesis of alkynylphosphonates through a palladium-catalyzed consecutive Sonogashira/deacetonative process using aryl bromides, 2-methyl-3-butyn-2-ol and H-phosphonates is developed.

Cu(NO3)2·3H2O-mediated cyanation of aryl iodides and bromides using DMF as a single surrogate of cyanide

Cyanation of aryl iodides and bromides were approached by using DMF as a single source of “CN” in the presence of cheap Cu(NO₃)₂·3H₂O.

Copper-catalyzed cyanation of aryl iodides with α-cyanoacetates via C–CN bond activation

A mild copper-catalyzed cyanation of aryl iodides using readily available and friendly α-cyanoacetates as the CN source is reported.

Copper catalyzed nitrile synthesis from aryl halides using formamide as a nitrile source

A simple and efficient protocol has been developed for nitrile synthesis from aryl halides in the presence of an inexpensive and easily available copper catalyst along with triphenyl phosphine ligand.

Copper-mediated transformation of organosilanes to nitriles with DMF and ammonium iodide

Cyanation of aryl-, diaryldimethyl-, and styrylsilanes was developed for the first time under copper-mediated oxidative conditions using ammonium iodide and DMF as the combined source of nitrogen and carbon atom of the introduced cyano unit, respectively. The reaction was observed to proceed in a two-step process: initial conversion of organosilanes to their iodo intermediates and then cyanation. This method has a broad substrate scope with high functional group tolerance.

Copper-catalyzed cyanation of arenes using benzyl nitrile as a cyanide anion surrogate

The copper-catalyzed cyanation of arenes using benzyl nitrile as a cyanide anion surrogate furnishes aromatic nitriles in moderate to good yields. The cascade process involves a copper-catalyzed aerobic C-H oxidation, a retro-cyanohydrination, and a copper-catalyzed aerobic oxidative C-H functionalization.

Copper-mediated selective cyanation of indoles and 2-phenylpyridines with ammonium iodide and DMF

Copper-mediated regioselective cyanation of indoles and 2-phenylpyridines was developed by using ammonium iodide and DMF as the combined source of a cyano unit under "Pd-free" conditions. Mechanistic studies indicate that the reaction of indoles proceeds through a two-step sequence: electrophilic initial iodination and then cyanation. The cyanation has a broad substrate scope, high functional group tolerance, and excellent regioselectivity.