Computational design for enantioselective CO 2 capture: asymmetric frustrated Lewis pairs in epoxide transformations

• Published in: Beilstein journal of organic chemistry Vol. 20; pp. 2668 - 2681
• Main Authors: Ferrer, Maxime, Iribarren, Iñigo, Renningholtz, Tim, Alkorta, Ibon, Trujillo, Cristina
• Format: Journal Article
• Language: English
• Published: Germany 22-10-2024
• Subjects: volcano plot; carbon dioxide; asymmetric catalysis; frustrated Lewis pairs (FLPs); epoxide; CO2
• ISSN: 1860-5397; 1860-5397
• DOI: 10.3762/bjoc.20.224

Carbon capture and utilisation (CCU) technologies offer a compelling strategy to mitigate rising atmospheric carbon dioxide levels. Despite extensive research on the CO
insertion into epoxides to form cyclic carbonates, the stereochemical implications of this reaction have been largely overlooked, despite the prevalence of racemic epoxide solutions. This study introduces an in silico approach to design asymmetric frustrated Lewis pairs (FLPs) aimed at controlling reaction stereochemistry. Four FLP scaffolds, incorporating diverse Lewis acids (LA), Lewis bases (LB), and substituents, were assessed via volcano plot analysis to identify the most promising catalysts. By strategically modifying LB substituents to induce asymmetry, a stereoselective catalytic scaffold was developed, favouring one enantiomer from both epoxide enantiomers. This work advances the in silico design of FLPs, highlighting their potential as asymmetric CCU catalysts with implications for optimising catalyst efficiency and selectivity in sustainable chemistry applications.