A Flexible Strategy Towards Thienyl-, Oxazolyl- and Pyridyl-Fused Fluorenones
作者:Amel Souibgui、Anne Gaucher、Jérôme Marrot、Faouzi Aloui、Florence Mahuteau-Betzer、Bechir Ben Hassine、Damien Prim
DOI:10.1002/ejoc.201300233
日期:2013.7
The preparation of new thienyl-, oxazolyl-, and pyridyl-fused benzo[c]fluorenones has been developed from a unique and easily available common precursor. Starting from bromotetralone, a short sequence allowed the construction of various heterocycles followed by Suzuki coupling and final acid-promoted formation of the central cyclopentanone unit. The flexible strategy allowed the selective preparation