Hydroxyl Group-Enabled Highly Efficient Ligand for Pd-Catalyzed Telomerization of 1,3-Butadiene with CO2

摘要

Comprehensive Summary By introducing hydroxyl group into PPh3 ligand, a promoter-free palladium catalytic system based on (p-HOC6H4)PPh2 ligand was developed for the telomerization of 1,3-butadiene with CO2. High activity and selectivity towards CO2-incorporated divinyl delta-lactone monomer were achieved (TON/TOF: up to 4540/568 h(-1); selectivity of delta-lactone and its isomers: up to 97%). The key role of phenolic hydroxyl group of the ligand in attaining high activity was validated. The good performance of large-scale reaction in batch reactor demonstrated the potential utility of this simple catalytic system in valorizing CO2 with bulk chemical feedstock.

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