Pd-Catalyzed C-C Cross-Coupling Reactions within a Thermoresponsive and pH-Responsive and Chelating Polymeric Hydrogel
作者：Wang, Yao; Zhang, Jianzheng; Zhang, Wangqing; 等
關鍵字：hydrogel
論文來源：期刊
具體來源：JOURNAL OF ORGANIC CHEMISTRY
發(fā)表時間：2009年
pubs.acs.org/doi/abs/10.1021/jo802427k
A porous, thermoresponsive and pH-responsive, and chelating hydrogel of poly(N-isopropylacrylamide)-co-poly[2-methacrylic acid 3-(bis-carboxymethylamino)-2-hydroxypropyl ester] (PNIPAM-co-PMACHE) is proposed as both a reaction medium and the Pd catalyst support for organic synthesis. Organic synthesis within the PNIPAM-co-PMACHE hydrogel has three merits. First, organic reactions such as Suzuki and Heck reactions within the hydrogel can be accelerated due to the enriched Pd catalyst and reactants within the hydrogel by the reversible deswelling/swelling. Second, organic synthesis within the PNIPAM-co-PMACHE hydrogel, which holds about 300 times of water and is similar to the environmentally benign reaction medium of water, can be performed efficiently without surfactant or cosolvent being added. Third, the PNIPAM-co-PMACHE hydrogel itself and the therein-immobilized Pd catalyst can be easily recycled since the hydrogel/Pd composite can reversibly swell/deswell.