Easy access: A strontium/Schiff base complex as catalyst for the title reaction provided straightforward access to enantiomerically enriched spiro[imidazolidine‐4,3′‐oxindole] compounds, as well as a spiro[imidazoline‐4,3′‐oxindole] through a two‐step conversion from the Mannich adduct.
Catalytic methylative coupling of internalalkynes and aldehydes/aldimines through regioselective oxidative cyclization promoted by a phosphine–Co complex is presented. Such process constitutes an unprecedented and unique approach for Co-catalyzed generation of metallacycles that reversed inherent regiochemical biases to furnish a wide range of allylic alcohols and allylic amides bearing a tetrasubstituted