Heteropoly Acids as Heterogeneous Catalysts for Thioacetalization and Transthioacetalization Reactions
作者:Habib Firouzabadi、Nasser Iranpoor、Kamal Amani
DOI:10.1055/s-2002-19300
日期:——
Heteropoly acids are effective solid catalysts for the thioacetalization of carbonyl compounds. Tungstophosphoric acid (H 3 PW 1 2 O 4 0 ), was found to be an effective and a highly selective catalyst for the thioacetalization of aldehydes, ketones and for the transthioacetalization of acetals, acylals and O,S-acetals which proceeded in excellent yields in the absence of solvent. The catalyst has also been