Acetalation studies. Part VI. Concerning the effects of ultrasound on the benzylidenation of some alkyl D‐glycopyranosides

The effects of ultrasound on conventional Freudenberg-type benzylidenation reactions of some alkyl D-glycopyranosides is described. A considerable enhancement in the rates of formation of the expected acetals was observed. The pure products were obtained in good yields. Some of the crude air-dried products were suitable for direct derivatisation.