A Base‐Mediated Approach Towards Dihydrofuro[2,3‐ b ]Benzofurans from 2‐Nitrobenzofurans and 1,3‐Dicarbonyls

A straight‐forward approach for the synthesis of a dihydrofuro[2,3‐ b ]benzofuran derivatives has been achieved through a base‐mediated Michael addition of 1,3‐dicarbonyls to 2‐nitrobenzofurans followed by intramolecular cyclization. A variety of 1,3‐dicarbonyls, including cyclic as well as trifluoromethylated ones, have been subjected to react with 2‐nitrobenzofurans under optimal conditions, and the respective dihydrofuro[2,3‐ b ]benzofurans could be accessed in moderate to excellent yields.