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 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
通过在PPh 3
配体中引入羟基,开发了一种基于( p -HOC 6 H 4 )PPh 2
配体的无助催化剂
钯催化体系,用于
1,3-丁二烯与CO 2的调聚反应。实现了对掺入 CO 2的二
乙烯基 δ-内酯单体的高活性和选择性(TON/TOF:高达 4540/568 h -1;δ-内酯及其异构体的选择性:高达 97%)。验证了
配体的
酚羟基在获得高活性中的关键作用。间歇反应器中大规模反应的良好性能证明了这种简单的催化系统在提高 CO 2价值方面的潜在用途与大宗
化学原料。