Abstract
ABSTRACTA GaCl3‐catalyzed [3 + 2]‐cycloaddition/intramolecular esterification cascade of donor–acceptor cyclopropane‐1,1‐diesters with salicylaldehydes has been reported. A wide range of tetrahydro‐4H‐furo[3,2‐c]chromen‐4‐ones have been efficiently delivered in moderate to good yields. Mechanistic studies suggest that the reaction involves the [3 + 2]‐cycloaddition followed by intramolecular esterification to access 4H‐furo[3,2‐c]chromenones.
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