Direct Annulations toward Phosphorylated Oxindoles: Silver‐Catalyzed Carbon‐Phosphorus Functionalization of Alkenes

Silver screen: The AgNO3-catalyzed carbon phosphorylation of alkenes occurs by an alkene addition/cyclization cascade. Ag+ reacts with Ph2P(O)H to form the crucial active intermediate 1, which promotes the reaction. This method requires a cheap, nontoxic silver salt as the catalyst and substrates for the transformation are simple and readily accessible.