Abstract
Titanium trichloride in EtOH can be reduced by Al to the corresponding low‐valent titanium complexes. This can reduce some aromatic aldehydes and ketones to the corresponding pinacols in 40–82% yields within 30–90 min at r.t. under ultrasound irradiation.
Acknowledgments
We thank the Educational Ministry of China and Natural Science Foundation of Hebei Province (203107), China, for financial support.