Studies on the Neodymium-induced Pinacol Coupling of Aromatic Aldehydes and Ketones in Aqueous Media

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Pinacol coupling reactions of aromatic aldehydes and ketones were carried out using Nd-36% HOAc-CH2Cl2 system with stirring at r. t. for 4 h (in 14-70% yield). The reactions in the same system gave pinacols in 10-93% yield under ultrasound irradiation at r.t.for 2 h.
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