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Updated: Jul 7, 2026

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Published on: February 7, 2017
Tetraarylphosphonium-supported carbodiimide reagents: synthesis, structure optimization and applications
Maryon Ginisty1, Marie-Noelle Roy, Jean-Christophe Poupon
1Département de Chimie, Université de Montréal, PO Box 6128, Station Downtown, Montréal, Canada QC H3C 3J7.
New tetraarylphosphonium (TAP)-supported carbodiimides act as efficient coupling reagents for esterification and amidation. These reagents facilitate easy separation of by-products and can be regenerated, offering a sustainable approach to organic synthesis.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
Background:
- Carbodiimides are widely used coupling reagents in organic synthesis.
- Separation of urea by-products can be challenging, impacting reaction efficiency and sustainability.
Purpose of the Study:
- To synthesize and evaluate novel tetraarylphosphonium (TAP)-supported carbodiimide reagents.
- To optimize the structure of TAP-supported carbodiimides for enhanced reactivity and solubility.
- To develop a recyclable carbodiimide coupling system.
Main Methods:
- Synthesis of tetraarylphosphonium (TAP)-supported alkyl- and arylcarbodiimides.
- Application of these reagents in esterification, amidation, and dehydration reactions.
- Structure optimization studies.
- Regeneration of the carbodiimide reagent from urea by-products.
Main Results:
- Successful synthesis of novel TAP-supported carbodiimides.
- Efficient coupling reactions (esterification, amidation, dehydration) achieved.
- Easy separation of urea by-products via precipitation and filtration due to the TAP unit's solubility properties.
- Demonstrated regeneration and recycling of the carbodiimide reagent.
Conclusions:
- TAP-supported carbodiimides are effective and user-friendly coupling reagents.
- The solubility imparted by the TAP unit simplifies purification.
- The developed system offers a sustainable and recyclable alternative for carbodiimide-mediated synthesis.
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