Solvent-free, one-pot, four-component synthesis of 2H-indazolo[2,1-b]phthalazine-triones using sulfuric acid-modified PEG-6000 as a green recyclable and biodegradable polymeric catalyst
Keywords: بدون حلال; Multi-component synthesis; 2H-Indazolo[2,1-b]phthalazine-1,6,11(13H)-trione; Solvent-free; PEG-OSO3H; Catalyst; E-factor