Tungstophosphoric acid supported on silica gel (H3PW12O40/SiO2) as an eco-friendly, reusable and heterogeneous catalyst for chemoselective oxathioacetalization of carbonyl compounds in solution or under solvent-free conditions

Solid heteropoly acid supported on silica gel (H3PW12O40/SiO2) is easily used as a heterogonous, reusable and efficient catalyst for conversion of aromatic and aliphatic aldehydes and ketones to their corresponding 1,3-oxathiolanes at room temperature in solution or under solvent-free conditions. The catalyst can be easily recovered and reused for several times without loss of its activity. (c) 2005 Elsevier B.V. All rights reserved.