Tetrahedron Letters p. 8829 - 8832 (1996)
Update date:2022-08-04
Topics:
Benbow, John W.
Martinez, Bonnie L.
The generation of aryl anions prior to quenching with a trialkyl berate has been shown to be sensitive to the composition of the aryl substrate. Aryl iodides containing remote benzyl ether substituents undergo trans-metallation with sec-BuLi to cleanly give the desired aryl anions whereas the corresponding bromides afford appreciable quantities of dianionic intermediates. The aryl boronic acids derived from alkylation of these anions subsequently undergo a palladium mediated coupling with aryl halides to provide good yields of the desired biaryls. Copyright (C) 1996 Elsevier Science Ltd.
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