A different route to 3-aryl-4-hydroxycoumarins
SA Rodríguez, MT Baumgartner
Index: Rodriguez, Sergio A.; Baumgartner, Maria T. Tetrahedron Letters, 2010 , vol. 51, # 40 p. 5322 - 5324
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Citation Number: 7
Abstract
We herein report the simple and direct arylation of 4-hydroxycoumarins by photoinduced reaction with aryl halides (iodobenzene, iodonaphthalene, 4-iodoanisole, 2-iodoanisole). Good yields of 3, 4-disubstituted coumarins were obtained in these reactions (> 60%). Extension of the procedure to the reaction with o-dihalobenzenes leads to the synthesis of ring closure products which bear a tetracyclic aromatic-condensed ring system, although ...
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