Esters and Their Impact on Chemical Reactions: From Reduction to Oxidation Esters are organic compounds that are derived from an acid and an alcohol. They are formed as a result of a condensation reaction between a carboxylic acid and an alcohol with the elimination of a water molecule. This reaction is also called an esterification reaction. https://articlescad.com/esters-an-important-class-of-organic-compounds-310413.html