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E-Journal of Chemistry
Volume 3, Issue 4, Pages 230-235
http://dx.doi.org/10.1155/2006/107491

Pinacol Coupling of Aromatic Aldehydes using La-Ticl4 in CH3COOEt under Ultrasound Irradiation

Ji-Tai Li, Xue-Li Sun, Zhi-Ping Lin, and Tong-Shuang Li

College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding 071002, China

Received 29 May 2006; Accepted 31 July 2006

Copyright © 2006 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Titanium tetrachloride can be reduced by lanthanum filings to the corresponding low valent titanium complex, which can induce some aromatic aldehydes to the corresponding pinacols in 28%-97% yields within 10-50 min in ethyl acetate at r.t. under ultrasound irradiation.