Abstract
Novel paths for homogeneous and regioselective functionalization of cellulose are discussed. The acylation of cellulose can be efficiently carried out by homogeneous phase chemistry applying solvents based on polar aprotic media or in ionic liquids and in situ activation of the carboxylic acid. Some unconventional cellulose derivatives are described. The regioselective derivatization of protected cellulosics leading to 3-O-, 2,3-O-, and 6-O-functionalized products is of recent interest showing remarkable differences in properties compared with common cellulose derivatives. The nucleophilic displacement reactions with cellulose tosylates provide a further tool for the design of biopolymer-based structures and properties.
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