The intramolecular allenolate Rauhut-Currier reaction

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• The traditional Rauhut-Currier reaction is a valuable tool for C-C bond formation.
• Accessing highly functionalized cyclic compounds can be challenging using conventional methods.

Purpose of the Study:

• To develop a novel intramolecular Rauhut-Currier reaction.
• To synthesize densely functionalized 5- and 6-membered rings.
• To explore new synthetic routes for complex organic molecules.

Main Methods:

• Intramolecular reaction design utilizing ynoate-enoate, ynoate-enenitrile, and alkynyl sulfone-enenitrile substrates.
• Catalysis by trialkylphosphines.
• Use of trimethylsilyl cyanide (TMSCN) as a pronucelophile for catalyst turnover and C-C bond formation.

Main Results:

• Successful synthesis of densely functionalized 5- and 6-membered rings.
• Demonstration of a novel Rauhut-Currier reaction pathway.
• Formation of a second carbon-carbon bond via TMSCN.

Conclusions:

• The developed intramolecular Rauhut-Currier reaction provides efficient access to unique cyclic structures.
• The use of highly electrophilic alkynes expands the scope of Rauhut-Currier chemistry.
• This method offers a valuable alternative for synthesizing complex molecules not easily accessible through traditional routes.