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Silver-catalyzed direct selanylation of indoles: synthesis and mechanistic insights

Autores: Elise Ane Maluf RiosCarla M. B. GomesGabriel L. SilvérioEduardo Q. LuzSher AliCaroline da Ros Montes D’OcaBreidi AlbachRenan B. Campos and Daniel S. Rampon.

Abstract

Herein we describe the Ag(I)-catalyzed direct selanylation of indoles with diorganoyl diselenides. The reaction gave 3-selanylindoles with high regioselectivity and also allowed direct access to 2-selanylindoles when the C3 position of the indole ring was blocked via a process similar to Plancher rearrangement. Experimental analyses and density functional theory calculations were carried out in order to picture the reaction mechanism. Among the pathways considered (via concerted metalation–deprotonation, Ag(III), radical, and electrophilic aromatic substitution), our findings support a classic electrophilic aromatic substitution via Lewis adducts between Ag(I) and diorganoyl diselenides. The results also afforded new insights into the interactions between Ag(I) and diorganoyl diselenides.

Rios, Elise Ane Maluf; Gomes, Carla M. B.; Silvério, Gabriel L.; Luz, Eduardo Q.; Ali, Sher; D’oca, Caroline Da Ros Montes; Albach, Breidi; Campos, Renan B.; Rampon, Daniel S. Silver-catalyzed direct selanylation of indoles: synthesis and mechanistic insights. RSC Advances, v. 13, p. 914-925, 2023. 

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Universidade Federal do Paraná Departamento de Química Grupo de Pesquisa em Síntese Orgânica Medicinal e Agroquímica Av. Cel. Francisco H. dos Santos, 100 81531-980, Curitiba, Paraná @somaufpr (41) 3361-3175