A GENERAL ALTERNATIVE TO OBTAIN S.S-ACETALS USING TAFF, A BENTONITIC CLAY, AS THE CATALYST^*

Abstract

A one-pot general alternative to prepare dithioacetals, with excellent yields, via the condensation of 1,3-propanedithiol, benzyl, and n-butyl mercapthanes with several carbonylic compounds using a bentonitic earth as the catalyst is proposed. Also, the acidic role of the clay in the reaction is discussed. The product structures were established by 1H and 13C NMR, as well as by the corresponding EIMS and HRMS data.