 NDL India: Synthesis of ortho-Hydroxybenzophenones Catalyzed by Magnetically Retrievable Fe3O4 Nanoparticles under Ligand-Free ConditionsSynthesis of ortho-Hydroxybenzophenones Catalyzed by Magnetically Retrievable Fe3O4 Nanoparticles under Ligand-Free Conditions Synthesis of ortho-Hydroxybenzophenones Catalyzed by Magnetically Retrievable Fe3O4 Nanoparticles under Ligand-Free ConditionsAuthor Ramani, Thekkathu Umadevi, Paspulati Prasanth, K. Leon Sreedhar, Bojja 