Synthesis of indoles under the action of visible light (microreview)

Pd-catalyzed efficient synthesis of 3-formylindole derivatives with diaziridinone

This work describes an efficient Pd-catalyzed annulation process of acetal alkynes, aryl iodides, and di-t-butyldiaziridinone to afford a variety of 3-formylindoles and their derivatives. The reaction likely proceeds through a regioselective Heck reaction followed by aryl C-H activation to form a pallada(II)cycle, which is bisaminated with diaziridinone via a pallada(IV)cycle. The utility of the current reaction process is demonstrated by the facile synthesis of bioactive indoles.

Visible-light-mediated defluorinative cyclization of α-fluoro-β-enamino esters catalyzed by 4-CzIPN

Using 4-CzIPN as an energy transfer (EnT) photocatalyst and α-fluoro-β-enamino esters as the substrates, a mild 6π-photocyclization/defluorination of N-aryl enamines was carried out to efficiently construct indoles without oxidant and...

Pd-Catalyzed Indole Synthesis via C-H Activation and Bisamination Sequence with Diaziridinone

This work describes an efficient Pd-catalyzed indole synthesis. A wide variety of indoles can be obtained in good yields from readily available vinyl bromides. The reaction likely proceeds through a sequential aryl C-H activation and bisamination of a resulting pallada(II)cycle with diaziridinone.

Visible light-mediated chemistry of indoles and related heterocycles

The impact of visible light-promoted chemistry on the functionalization of indoles and related heterocycles is reviewed.