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Synlett 1990; 1990(2): 89-91
DOI: 10.1055/s-1990-20995
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Ultrasound-Promoted Acyloin Condensation and Cyclization of Carboxylic Esters

Antoine Fadel* , Jean-Louis Canet, Jacques Salaün
  • *Laboratoire des Carbocycles, associé au CNRS, Institut de Chimie Moléculaire d'Orsay, Bât. 420, Université de Paris-Sud, F-91405 Orsay, France
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Publication Date:
08 March 2002 (online)

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The acyloin coupling of 1,4-, 1,5-, and 1,6-diesters to 4-, 5-, 6-membered ring products and the cyclization of ß-chloroesters to 3-membered ring products in the presence of chlorotrimethylsilane, which usually requires highly dispersed sodium, is simplified and improved under sonochemical activation.

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