Gold(I)-Catalyzed Synthesis of 2,2'-Biindoles via One-Pot Double Cycloisomerization Strategy

The first systematic, concise and target-directed gold(I)-catalyzed synthesis of a family of 2,2'-biindoles containing different substitution patterns is described. The developed protocol involves the synthesis of 1,3-diyne-anilines followed by a one-pot gold(I)-catalyzed double cycloisomerization, giving rise to an efficient, broad and general protocol to get different 2,2'-biindoles under mild reaction conditions. Due to the methodological restriction of present methods for accessing this class of compounds, herein we present our synthetic proposal which allowed the preparation of several examples of 2,2'-biindoles. Their functionalization-guided us to the discovery that the chemical stability, is substitution structure-dependent.

Iodine(III)-Containing Reagents in Photo-Assisted and Photo-Catalyzed Organic Synthesis

Iodine(III) reagents have become a highly relevant tool in organic synthesis due to their great versatility as strong but green oxidants. Several transformations involving cyclizations as well as functionalization of different organic cores have been broadly described and reviewed. Herein, the participation of these reagents in photochemical transformations exclusively by direct irradition or in photoredox cycles using some transition metals, will be briefly described as well as some plausible further transformations that potentially can be developed.