An efficient entry to monoiminophosphoranes derived from 1,2-bis(diphenylphosphino)ethane: new bidentate P,N ligands

Base-catalyzed Michael-type addition of diphenylphosphane to P,P,P-diphenylvinyl iminophosphoranes yielded monoiminophosphoranes derived from 1,2-bis(diphenylphosphino)ethane, heteroditopic P,N-donor ligands which are not easily available by the direct monoimination of the parent bis(phosphane).