Structurally Constrained Cyclic (Diacyloxyiodo)Arenes as an Enabling Platform for Hypervalent Iodine(III) Chemistry

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Hypervalent iodine(III) chemistry offers significant synthetic potential but is limited by thermodynamic challenges and reliance on harsh oxidants.
• Existing methods often require unstable reagents or complex electrocatalytic setups, hindering broader application.

Purpose of the Study:

• To introduce a novel platform of structurally constrained cyclic (diacyloxyiodo)arenes for hypervalent iodine(III) chemistry.
• To address the reactivity, selectivity, and generality paradox in iodine(III) reagent synthesis and application.
• To develop a sustainable and efficient one-pot method for generating diverse hypervalent iodine(III) species.

Main Methods:

• Synthesis and characterization of cyclic (diacyloxyiodo)arenes.
• Demonstration of in situ controlled-release of hypervalent iodine(III) reagents.
• Application in catalytic reactions, asymmetric synthesis, and peptide modifications.
• Computational analysis using Density Functional Theory (DFT) calculations.

Main Results:

• Successful one-pot synthesis of various hypervalent iodine(III) reagents from cyclic (diacyloxyiodo)arenes.
• Demonstrated utility in diverse catalytic transformations, including asymmetric variations.
• Confirmed biocompatibility for applications like peptide modification.
• DFT revealed that spatial dianion control via intramolecular secondary bonding enhances reactivity and selectivity.

Conclusions:

• Cyclic (diacyloxyiodo)arenes represent a transformative platform for advancing hypervalent iodine(III) chemistry.
• The in situ controlled-release approach offers a sustainable and versatile method for reagent generation.
• This discovery overcomes previous limitations, enabling broader synthetic and catalytic applications with enhanced outcomes.