Amide bond formation with a new fluorous carbodiimide: separation by reverse fluorous solid-phase extraction

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Carbodiimide coupling is a widely used method for amide bond formation.
• Purification of amide products can be challenging, often requiring chromatography.

Purpose of the Study:

• To introduce a new fluorous carbodiimide reagent.
• To develop a convenient and efficient procedure for amide coupling and purification.

Main Methods:

• Amide coupling reactions were performed using the novel fluorous carbodiimide with various acids and amines.
• Purification was achieved through reverse fluorous solid-phase extraction (FSPE) using standard silica gel.
• HFE-7100 was employed as a fluorous solvent crucial for the FSPE process.

Main Results:

• The fluorous carbodiimide enabled amide coupling reactions under standard conditions.
• Reverse FSPE provided a simple and effective method for isolating amide products.
• Good yields and high purities of the target amide products were obtained.

Conclusions:

• The new fluorous carbodiimide is a valuable reagent for amide synthesis.
• The developed procedure offers a convenient and efficient route to pure amides.
• Reverse FSPE is a key technique for purifying fluorous-tagged compounds.