Petrier C.; Suslick, K. S. "Ultrasound-Enhanced Reactivity Of Calcium In The Reduction Of Aromatic Hydrocarbons" Ultrasonics Sonochemistry 2000, 7, 53-61. (http://www.scs.uiuc.edu/suslick/pdf/uss0053.pdf)
(http://www.scs.uiuc.edu/suslick/pdf/uss0053.pdf) Typical reaction is carried under an argon atmosphere and the cleanup after the reduction looks tedious, but I think it's worth of it. Tert-butanol were used as hydrogen donor and the isolated yields were great. As this reaction is done with sonication device connected to the reaction flask, I wonder could it beconverted for more cheaper "normal" ultrasonic bath cleaner?- Suslick, K. S.; Casadonte, D. J. "Heterogeneous Sonocatalysis with Nickel Powder" J. Am. Chem. Soc. 1987, 109, 3459-3461. (http://www.scs.uiuc.edu/suslick/pdf/jacs873459.pdf)
(http://www.scs.uiuc.edu/suslick/pdf/jacs873459.pdf)Nitroalkene with ultrasound (https://www.thevespiary.org/rhodium/Rhodium/chemistry/nitrostyrene.ultrasound.html)
(https://www.thevespiary.org/rhodium/Rhodium/chemistry/nitrostyrene.ultrasound.html)modified to produce DL-threo-substituted-nitroalkenes for optical resolution (https://www.thevespiary.org/rhodium/Rhodium/chemistry/norpseudoephedrine.html)
(https://www.thevespiary.org/rhodium/Rhodium/chemistry/norpseudoephedrine.html)