Functionalization of β-Alkylcorrole Using Ag(I) Salts

Area of Science:

• Coordination Chemistry
• Organometallic Chemistry
• Synthetic Chemistry

Background:

• The coordination chemistry of β-alkylcorroles is underdeveloped compared to triarylcorroles.
• Existing synthetic methods for silver insertion into triarylcorroles were explored for β-alkylcorroles.

Purpose of the Study:

• To investigate the synthesis of silver complexes of β-alkylcorroles.
• To understand the reactivity and coordination behavior of β-alkylcorroles with silver.

Main Methods:

• Reactions of β-alkylcorroles with various silver salts (AgOAc, AgNO2, AgPF6, AgNO3) in different solvents (pyridine, acetonitrile).
• Characterization using UV-vis spectroscopy, 1H NMR, mass spectrometry, and single-crystal X-ray crystallography.

Main Results:

• Using AgOAc led to oxocorrole formation and acetate incorporation at the meso-position.
• AgNO2 resulted in rapid meso-nitration, followed by silver insertion into the trinitrocorrole free base over extended times.
• Silver salts with non-nucleophilic anions did not yield metalation or meso-functionalization.

Conclusions:

• β-alkylcorroles exhibit distinct reactivity compared to triarylcorroles.
• Silver coordination into the alkylcorrole core is hindered and often requires peripheral substitution.
• The synthetic route to silver β-alkylcorrole complexes is complex and prone to oxidation and functionalization.