Alkylation-Terminated Catellani Reactions Using Alkyl Carbagermatranes

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• The Catellani reaction is a powerful tool for aromatic derivatization.
• Previous Catellani reactions using alkyl electrophiles primarily achieved ortho-alkylation.
• Ipso-alkylation-terminated Catellani reactions with β-H-containing reactants remained a challenge.

Purpose of the Study:

• To develop a novel Catellani reaction for ipso-alkylation-terminated processes.
• To explore the use of alkyl carbagermatranes (alkyl-Ge) as nucleophiles in the Catellani reaction.
• To enable efficient dialkylation with β-H-containing reactants.

Main Methods:

• Development of a new Catellani reaction protocol.
• Utilizing alkyl carbagermatranes (alkyl-Ge) as nucleophiles.
• Investigating the reactivity of alkyl-Ge and alkyl-boronic acids (alkyl-B(OH)2).

Main Results:

• Successful alkylation-terminated Catellani reaction achieved.
• Demonstrated efficient dialkylation using β-H-containing reactants.
• Established the utility of alkyl-Ge as effective nucleophiles in this transformation.

Conclusions:

• A novel Catellani reaction enabling ipso-alkylation-terminated dialkylation has been developed.
• This method expands the scope of Catellani reactions to include previously inaccessible substrates.
• Alkyl carbagermatranes offer a new avenue for nucleophilic participation in Catellani reactions.