An ester could be synthesized by using many different techniques. One method is to utilize carboxylic acid and an alcohol in presence of a catalyst like sulfuric acid. Additionally, nitrile, acyl chlorides and anhydrides can use to form an ester. Different other method could be used, for example, transesterficiation and reaction of a salt (carboxylate) with an alkyl halide.3 Carboxylic acid with an alcohol is one of the common methods. This technique has known as the Fischer esterification method. The carboxylic acid, the alcohol, and the ester product are in equilibrium because the reaction is reversible.3 Fischer method is identified by a hydrolysis reaction as backwards and esterification as forward reaction. In this reaction, the first
