A straightforward and highly efficient procedure for the thioacetalization of a variety of
aldehydes and transthioacetalization of acylals and acetals in good to excellent yields using
catalytic amounts of sulfonated polyanthracene (S-PAT) is reported. The reactions were
carried out in the presence of 1, 2-ethanedithiol and 1, 3-propanedithiole at room
temperature under solvent-free conditions. Thioacetals were also prepared by the reaction
of aromatic ketone and dithiole using S-PAT under reflux conditions in H2O as green ..