Kharasch-Type Cyclizations of 2-Substituted Indole Derivatives Surprisingly Lead to Spiroindoles

[摘要]：Starting from 1H-indole-2-carboxylic acid, a series of spiro[2-oxoindole-pyrrolidines] could be synthesized in a straightforward manner The key reaction is a Kharasch radical cyclization reaction of trichloroacetylated precursors The identity of the tricyclic final products that were formed could be determined as spiro[2-oxoindole-pyrrolidines] by using a combination of different analytical techniques [H-1, NMR, C-13 NMR, gHMBC, HRMS) and additional reactions The produced skeletons are interesting from a medicinal point of view

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