Am i mistaken that there's an article on Rh's that describes oximes being cleaved w/dithionite to the parent ketones/ald's? (Edit - yep, it's here: https://www.thevespiary.org/rhodium/Rhodium/chemistry/redamin.dithionite.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/redamin.dithionite.html)
) Funny! Funny!
Antoncho
P.S. Dithionites are made by reducing alcoholic bisulfite soln's w/Zn powder, AFAIK, but i'd dearly like to see an experimental proc. of their prep'n someday.
The ref you are looking for is Pictet and Gams, Berichte 42, 2943 (1909) - but according to http://www.undcp.org/bulletin/bulletin_1952-01-01_3_page006.html (http://www.undcp.org/bulletin/bulletin_1952-01-01_3_page006.html)
they used SnCl2 to reduce the oximinoketone to an aminoketone - perhaps there are multiple preps in the journal?
This ref on my page that Antoncho mentions says dithionite cleaves oximes, and reduces imines - strange. Bull.Soc.Chim.Fr. 4, 565-577 (1986) talks about dithionite reductions of oximes though.