M. Curini et al., HETEROGENEOUS CATALYSIS IN CARBONYL REGENERATION FROM 1,3-DITHIOLANESAND 1,3-DITHIANES BY ZIRCONIUM SULFOPHENYL PHOSPHONATE, Synlett, (7), 1997, pp. 769
Layered zirconium sulfophenyl phosphonate was found to be an efficient
heterogeneous catalyst for mild hydrolysis of 1,2 dithiolanes and 1,3
dithianes to their corresponding carbonyl compounds.