作者:Nellepalli Pothanagandhi、Akella Sivaramakrishna、Kari Vijayakrishna
DOI:10.1016/j.reactfunctpolym.2016.07.021
日期:2016.9
polymerization techniques are used in polymer-assisted solution phase Diels–Alder reactions between isoprene and a variety of dienophiles. With 5 mol% loading, these polyelectrolytes exhibit very good catalytic activity toward Diels–Alder reaction with quantitative yields within 30 min at room temperature. These polyelectrolyte-catalyzed reactions resulted in good para/meta-like product ratios. Here, the coordination
咪唑基的聚(离子液体)轴承溴化物和双(三氟甲烷)磺酰亚胺作为抗衡阴离子[聚(ViEIm)溴和聚(ViEIm)NTF 2 ]从可逆加成断裂链转移(RAFT)聚合技术得到的在使用聚合物辅助溶液相异戊二烯与各种亲二烯体之间的Diels–Alder反应。负载量为5 mol%时,这些聚电解质对Diels-Alder反应表现出非常好的催化活性,并且在室温下30分钟内具有定量收率。这些聚电解质催化的反应产生了良好的对位/间位相似的产品比率。在此,聚电解质中带正电的咪唑鎓基团与亲二烯体的配位性质在催化剂活性和选择性中起关键作用。这些聚电解质可重复使用4个循环,而不会显着降低其催化活性和选择性。