Exploiting the Different Nucleophilicity of the Isocyano Group: A Strategy for the Isocyanide Functionalization

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Multicomponent reactions (MCRs) like Passerini and Ugi are powerful tools in organic synthesis.
• Selective functionalization of molecules with multiple reactive groups remains a challenge.

Purpose of the Study:

• To develop a method for selective reaction of aliphatic isocyano groups in the presence of aromatic isocyano groups within MCRs.
• To synthesize novel α-acyloxy carboxamides and α-acylamino carboxamides with one or two isocyanide functionalities.

Main Methods:

• Exploiting the differential nucleophilicity between aromatic and aliphatic isocyanides.
• Utilizing Passerini and Ugi multicomponent reactions.

Main Results:

• Selective reaction of aliphatic isocyano groups was achieved while preserving aromatic isocyano groups.
• Successfully synthesized α-acyloxy carboxamides and α-acylamino carboxamides containing one or two isocyanide groups.
• The developed method offers an alternative to traditional formylation and dehydration protocols.

Conclusions:

• The developed strategy provides a straightforward route to complex isocyanide-containing molecules.
• These synthesized analogues serve as versatile building blocks for further chemical exploration and applications.