Related Experiment Video
Updated: Jul 8, 2026

Synthesis of Esters Via a Greener Steglich Esterification in Acetonitrile
Published on: October 30, 2018
A new irreversible enzyme-aided esterification method in organic solvents
Günter E Jeromin1, Annegreth Zoor
1Aachen University of Applied Sciences, Campus Jülich, FB 3, Ginsterweg 1, 52428, Julich, Germany. jeromin@fh-aachen.de
Abstract:
A new irreversible esterification method for carboxylic acids catalyzed by a lipase from Candida antarctica (Novozyme 435) in organic solvents has been developed. The water produced during the process is chemically destroyed by a corresponding ester of acetoacetate, which acts as a sacrificial substrate in this reaction. The flavour esters isobutyl acetate, methyl butyrate, ethyl butyrate and benzyl butyrate were synthesized either in small scale (0.05 mol) or large scale (1 mol). The yields range from 82 to 92% within 24 h at 52 degrees C. Optimal molar ratios of reactants were 1:1:1 (carboxylic acid:alcohol:acetoacetate).
More Related Videos
06:31Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators
Published on: November 27, 2015
09:08Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol
Published on: April 2, 2018
Related Concept Videos
Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Mechanism
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview
Esters to Carboxylic Acids: Saponification
The reaction requires a base in stoichiometric amounts, which participates in the reaction and is not regenerated later. So, the base acts as a...
Alkylation of β-Diester Enolates: Malonic Ester Synthesis
Alkylation of β-Ketoester Enolates: Acetoacetic Ester Synthesis