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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 20, 1990 - Issue 22
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Original Articles

The O-Alkylation of 5-Hydroxy Chromones. A Comparison of Two Non-Classical Techniques, PTC in the Absence of Solvent and Sonochemical Activation in Polar Aprotic Solvents

T. J. Mason School of Chemistry, Coventry Polytechnic, Coventry, CV1 5FB, UK
,
J. P. Lorimer School of Chemistry, Coventry Polytechnic, Coventry, CV1 5FB, UK
,
L. Paniwnyk School of Chemistry, Coventry Polytechnic, Coventry, CV1 5FB, UK
,
A. R. Harris Fisons PLC, Pharmaceutical Division, R&D Labs., Bakewell Rd., Loughborough, Leics, LE11 0RH
,
P. W. Wright Fisons PLC, Pharmaceutical Division, R&D Labs., Bakewell Rd., Loughborough, Leics, LE11 0RH
,
G. Bram Laboratoire des Reactions Selective sur Supports, Universite de Paris Sud, 91405, ‐Orsay, France
,
A. Loupy Laboratoire des Reactions Selective sur Supports, Universite de Paris Sud, 91405, ‐Orsay, France
,
G. Ferradou Laboratoire des Reactions Selective sur Supports, Universite de Paris Sud, 91405, ‐Orsay, France
&
J. Sansoulet Laboratoire des Reactions Selective sur Supports, Universite de Paris Sud, 91405, ‐Orsay, France
 show all
Pages 3411-3420 | Received 26 Sep 1990, Published online: 24 Oct 2006
 
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Abstract

Significant differences are observed in the reaction rates and the product distribution in the alkylation reactions of ethyl 5-hydroxy chromone-2-carboxylate with primary and secondary alkyl halides under thermal, PTC and ultrasonic conditions.

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