CELLULOSE SULPHURIC ACID (CSA) AS A BIODEGRADABLE, RECYCLABLE CATALYST FOR AN EFFICIENT FORMATION OF CARBON-SULPHUR BOND: EXPLORED THROUGH THE TRANSTHIOACETALIZATION OF ACETALS AND ACYLALS

Abstract

Cellulose sulphuric acid (CSA) as a degradable, bio-polymeric acid was synthesized and its utility as an efficient, reusable catalyst was investigated for the transthioacetalization of O, O-acetals, S, O-acetals and acylals. Acetals and acylals of a diverse range of aldehydes as well as ketones were observed to undergo the conversion smoothly at room temperature in acetonitrile. High yields, very short reaction times, reusability of catalyst, environmental benign conditions are the salient features of the present protocol. Structures of the synthesized compounds were confirmed by their analytical studies such as 1H NMR, 13C NMR, Mass, FTIR and qualitative analysis.