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Hydrolysis of esters under acidic conditions proceeds through a nucleophilic acyl substitution. In the presence of excess water, the reaction proceeds in a reversible manner, forming carboxylic acids and alcohols.
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...
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Esters can be hydrolyzed to carboxylic acids under acidic or basic conditions. Base-promoted hydrolysis of esters is a nucleophilic acyl substitution reaction in which esters react with an aqueous base, followed by an acid to give carboxylic acids. This reaction is also known as saponification because it forms the basis for making soaps from fats.
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The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Non-activated Esters as Reactive Handles in Direct Post-Polymerization Modification.

Joachim F R Van Guyse1,2, Yann Bernhard1,3, Annelore Podevyn1

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Summary

This review explores using non-activated esters for polymer modification. These versatile functional groups offer a valuable, cost-effective alternative to activated esters for transesterification and amidation reactions.

Keywords:
AmidationCatalysisPolymersPost-Polymerization ModificationTransesterification

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Area of Science:

  • Polymer Chemistry
  • Organic Synthesis

Background:

  • Non-activated esters are common in polymer science due to monomer diversity and compatibility.
  • Their low reactivity limits their use in post-polymerization modification, unlike activated esters.

Purpose of the Study:

  • To review methods for utilizing non-activated esters as reactive handles.
  • To highlight their potential in macromolecular engineering.

Main Methods:

  • Discussion of past and recent synthetic efforts.
  • Focus on transesterification and aminolysis/amidation reactions.

Main Results:

  • Development of methodologies for modifying non-activated esters.
  • Demonstration of their utility in polymer science.

Conclusions:

  • Non-activated esters present a synthetically and economically viable approach for polymer modification.
  • These methods offer new avenues for macromolecular engineering.