Copper-catalysed azide-alkyne cycloadditions (CuAAC): an update.

Area of Science:

• Organic Chemistry
• Catalysis
• Green Chemistry

Background:

• Click chemistry, particularly copper-catalyzed azide-alkyne cycloaddition (CuAAC), has revolutionized organic synthesis since its discovery in 2002.
• CuAAC reactions are highly efficient and versatile, enabling the formation of triazoles from organic azides and alkynes.

Purpose of the Study:

• To review recent advancements in copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions.
• To classify and analyze new developments in CuAAC catalysis reported in the literature since 2010.

Main Methods:

• Literature review of scientific publications from 2010 onwards.
• Classification of CuAAC reactions based on the type of copper catalyst precursor used.
• Analysis of catalyst precursors including copper(I) and copper(II) salts/complexes, metallic copper, nano-particulated copper, and solid-supported copper systems.

Main Results:

• Recent literature (since 2010) showcases diverse copper catalyst precursors for CuAAC reactions.
• Innovations include the use of copper(I)/copper(II) salts, complexes, metallic, nano-particulated, and solid-supported copper systems.
• The review categorizes these advancements based on the specific copper catalyst employed.

Conclusions:

• The field of copper-catalyzed azide-alkyne cycloaddition (CuAAC) continues to evolve with novel catalyst systems.
• Recent research highlights the versatility and expanding applications of CuAAC in organic synthesis.
• The classification of catalysts provides a valuable overview for researchers in the field.