An indium-mediated allylative/transesterification DFT-directed approach to chiral C(3)-functionalized phthalides

Area of Science:

• Organic Chemistry
• Asymmetric Synthesis
• Organometallic Chemistry

Background:

• Chiral phthalides are valuable structural motifs in medicinal chemistry.
• Efficient and stereoselective synthetic routes are crucial for accessing these compounds.

Purpose of the Study:

• To develop a novel one-pot synthesis for chiral C(3)-substituted phthalides.
• To rationalize the stereochemical outcome using computational methods.
• To investigate factors influencing enantioselectivity.

Main Methods:

• Indium-mediated allylation/transesterification reaction.
• Density Functional Theory (DFT) calculations for mechanistic insight and stereoselection.
• Varying aldehyde substrates to assess impact on reaction outcome.

Main Results:

• Successful one-pot synthesis of chiral C(3)-substituted phthalides.
• DFT calculations elucidated the stereoselective mechanism of the indium-mediated process.
• Enantiomeric excess was found to be dependent on aldehyde steric and electronic properties.

Conclusions:

• The described indium-mediated reaction offers an efficient route to chiral phthalides.
• Computational modeling is a powerful tool for understanding and optimizing asymmetric reactions.
• Aldehyde structure is a key determinant for achieving high enantioselectivity in this transformation.