One-Pot, Pseudo Four-Component Synthesis of a Spiro[diindeno[1,2-b:2 ',1 '-e]pyridine-11,3 '-indoline]-trione Library

A one-pot, pseudo four-component method for the efficient and simple synthesis of spiro[diindeno[1,2-b: 2',1'-e]pyridine-11,3'-indoline]-2',10,12-trione derivatives in refluxing acetonitrile is reported. The features of this procedure are mild reaction conditions, high yields of products, and operational simplicity.