Zinc titanate nanopowder: an advanced nanotechnology based recyclable heterogeneous catalyst for the one-pot selective synthesis of self-aggregated low-molecular mass acceptor–donor–acceptor–acceptor systems and acceptor–donor–acceptor triads
A tin complex immobilized on silica gel was prepared and applied as a green and heterogeneous reusable catalyst for one-pot three-component synthesis of spirooxindoles in water.