Spiro[pyrrole‐3,2′‐3(2H)‐benzofuranones] 7 have been synthesized by [4+2] cycloaddition of 2‐arylidene‐3(2H)‐benzofuranones with the 2‐benzoyl‐1,2‐dihydroisoquinoline‐1‐carbonitrile tetrafluoroborates. In acidic medium or in refluxing DMF, the spiro compounds yield tetrasubstituted pyrroles or compounds derived from chromenopyrroles. The regio‐ and stereochemistry of the reaction was established by spectroscopic or X‐ray analysis.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.