As. Gajare et al., Selective transdithioacetalization of acetals, ketals, oxathioacetals and oxathioketals catalyzed by Envirocat EPZ10(R), J CHEM R-S, (8), 1998, pp. 452-453
Envirocat EPZ10(R) has been found to be a remarkable reusable heterogeneous
catalyst for selective transdithio-acetalization of acetals, ketals, oxath
ioacetals and oxathioketals with HSCH2CH2SH and HSCH2CH2CH2SH.