ABSTRACT:

Research Article

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, P. R. China

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.