“…The most commonly used acetylating reagents are acetic anhydride and acetyl chloride (Heinze & Liebert, 2004 of acetic anhydride to produce cellulose acetates (Hummel, 2004). Other reported methods for esterification include base-catalyzed transesterification, and ring-opening reactions (Connors & Albert, 1973;Das, Ali, & Hazarika, 2014;Fan et al, 2013;Heinze et al, 2006;Fan et al, 2014). Pyridine and 4-dimethyl-amino pyridine (DMAP) (Hofle, Steglich, & Vorbruggen, 1978) have been used as acylation catalysts in chemical synthesis.…”