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Comprehensive Summary By introducing hydroxyl group into PPh 3 ligand, a promoter‐free palladium catalytic system based on ( p ‐HOC 6 H 4 )PPh 2 ligand was developed for the telomerization of 1,3‐butadiene with CO 2 . High activity and selectivity towards CO 2 ‐incorporated divinyl δ‐lactone monomer were achieved (TON/TOF: up to 4540/568 h –1 ; selectivity of δ‐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 CO 2 with bulk chemical feedstock.
Yang et al. (2022) studied this question.