Three-Component Synthesis of Spiro[indoline-3,5′-pyrimido[4,5-b]quinoline]-triones in Water

A one-pot, three-component method for the efficient and simple synthesis of novel 2'-amino-8',9'-dihydro-3'H-spiro[indoline-3,5'-pyrimido[4,5-b] quinoline]-2,4',6'(7'H, 10'H)-trione derivatives in aqueous media is reported.