Isocyanates and isothiocyanates as versatile platforms for accessing (thio)amide-type compounds

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Traditional amide synthesis often involves multiple steps and harsh conditions.
• Developing direct, high-yielding routes to functionalized amides is crucial for efficient chemical synthesis.

Purpose of the Study:

• To establish a versatile and direct synthetic strategy for functionalized (thio)amide derivatives.
• To explore the nucleophilic addition of carbon and hydride reagents to isocyanates and isothiocyanates.

Main Methods:

• Utilized Grignard reagents, organolithium reagents, and the Schwartz reagent as nucleophiles.
• Investigated the chemoselective addition of these nucleophiles to isocyanates and isothiocyanates.

Main Results:

• Achieved direct and high-yielding synthesis of various functionalized (thio)amide derivatives, including haloamides and formamides.
• Demonstrated that chemoselective nucleophile delivery is key, minimizing the impact of steric and electronic factors.

Conclusions:

• The nucleophilic addition strategy provides a versatile, direct, and high-yielding pathway to functionalized amides.
• This method simplifies the synthesis of complex amide structures, overcoming limitations of classical approaches.