AGENT FOR INITIATING A RADICAL ADDITION REACTION AND IMPLEMENTING IT

摘要

The invention relates to an agent for initiating a radical addition reaction comprising or consisting of a persulfate and one or more transition metals, in elemental form or in an oxidized form, as well as a process for the preparation of. a compound of formula (I) in which X is chosen from S, Se and O; by a radical addition reaction in the presence of such an agent.