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Thiourea-Mediated Esterification by Redox Dehydration.

Hui Liu1, Longfei Han1, Weijie Jiao2

  • 1Department of Applied Chemistry, School of Ecology and Environment, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450011, P. R. China.

Organic Letters
|January 27, 2026
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Summary
This summary is machine-generated.

This study introduces a new, simple method for synthesizing esters and lactones using thiourea as an oxygen acceptor via desulfurization. This approach offers a greener alternative for organic synthesis, yielding valuable compounds efficiently.

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Area of Science:

  • Organic Chemistry
  • Synthetic Chemistry

Background:

  • Carboxylic esters are vital building blocks in pharmaceuticals, natural products, and materials.
  • Traditional esterification methods often rely on redox dehydration using phosphorus compounds (PIII/PV).

Purpose of the Study:

  • To develop a novel, efficient, and operationally simple method for ester and lactone synthesis.
  • To explore thiourea as an oxygen acceptor in redox dehydration for esterification.

Main Methods:

  • Redox dehydration employing thiourea as an oxygen ([O]) acceptor.
  • Desulfurization process for ester formation.

Main Results:

  • Successful synthesis of various esters and lactones.
  • Good to excellent yields achieved from readily available starting materials.
  • Demonstration of a rapid and operationally simple protocol.

Conclusions:

  • Thiourea serves as an effective oxygen acceptor in redox dehydration for ester synthesis.
  • This novel method provides an efficient route to valuable esters and lactones.
  • The protocol is operationally simple and suitable for diverse substrates.