A Michael Route to Acetals and Thioacetals: Preparation of Acetals (Thioacetals) of 2-Sulfonylacetaldehyde from Alkynyl and Other Unsaturated Aryl Sulfones - Cossu, Sergio; De Lucchi, Ottorino; Fabris, Fabrizio; Ballini, Roberto; Bosica, Giovanna (Synthesis, 1996)