Polyphosphoric acid supported on silica-coated NiFe₂O₄ nanoparticles: An efficient and magnetically-recoverable catalyst for N-formylation of amines

Amir Khojastehnezhad; Mohammad Rahimizadeh; Farid Moeinpour; Hossein Eshghi; Mehdi Bakavoli

Comptes Rendus. Chimie, Volume 17 (2014) p. 459-464