Direct Conversion of Agarose into Alkyl Mono‐ and Disaccharide Surfactants Based on 3,6‐Anhydro L‐ and D‐Galactose Units

In this work, a new type of agaran-derived non-ionic surfactants has been prepared through the one-pot transformation agarose into 3,6-anhydro L- and D-galactose acetal monomers dimers possessing one or two alkyl chains according to cyclic open form units. The steps process involves butanolysis butyl mono- disaccharide acetals promoted by presence Amberlyst-15Dry, followed transacetalization with n-dodecanol using same acid catalyst. chemical structures were fully characterized 1D 2D NMR experiments. Surface activities these products in pure as mixtures investigated depending on their hydrophilicity/hydrophobicity quite low values superficial tensions (<27 mN m−1) sunflower seed oil/water interfacial (∼5 obtained.