A Novel Entry into a New Class of (Chromanone-pyrrolidine/pyrrolizidine/pyrrolo[1,2-c]thiazole/pyrrolo[1,2-a]isoquinoline)indane-1,3-dione Ring Systems through [3+2] Cycloaddition - Jayashankaran, Jayadevan; Manian, Rathna Durga R S; Raghunathan, Raghavachary (Synthesis, 2006)