H. Wang et al., Ultrasonic accelerated hydrogenation of alpha,beta-unsaturated ketones with Raney Nickel catalyst, SYN COMMUN, 29(1), 1999, pp. 129-134
Various alpha,beta-unsaturated ketones and coumarin were hydrogenated in hi
gh yields with ultrasonic activated Raney Nickel. Only C=C bonds were reduc
ed. In the presence of ultrasonic waves, the catalyst is reusable.