We report the divergent synthesis of benzannulated 2,8-dioxabicyclo[3.2.1]octanes and 2,3-dihydrobenzofurans using the concept of the extended Corey-Chaykovsky reactions. With this concept, 2-hydroxychalcones were treated with the Corey ylide providing highly...

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Furyl-tethered O-acetyl oximes undergo rearrangement yielding densely substituted pyrroles in the presence of FeCl3·6H2O. Reactivity of a furan ring resembles the behaviour of an activated olefin with a formal leaving...

A simple general method for the synthesis of 1-acyl-2-(ortho-hydroxyaryl)cyclopropanes, which belong to the donor–acceptor cyclopropane family, has been developed. This method, based on the Corey–Chaykovsky cyclopropanation of 2-hydroxychalcones, allows for the preparation of a large diversity of hydroxy-substituted cyclopropanes, which can serve as promising building blocks for the synthesis of various bioactive compounds.