“…Among already known methods for peracetylation, a very common and inexpensive protection strategy in carbohydrate synthesis, Cloninger and co-workers [10] used Das et al's method [3] employing catalytic In(OTf) 3 in neat Ac 2 O, which works well for mannose and N-acetylglucosamine, being high yielding and efficient. The use of In(OTf) 3 eliminated the need for unpleasant solvents, such as pyridine, with the advantage of being affordable, nontoxic, water tolerant, and noncorrosive.…”