Green polyethylene oxide

Li B, Liu A-H, He L-N et al (2012) Iron-catalyzed selective oxidation of sulfides to sulfoxides with the polyethylene glycol/02 system. Green Chem 14(1) 130-135... 

Wang J-Q, He L-N, Miao C-X (2009) Polyethylene glycol radical-initiated oxidation of benzylic alcohols in compressed carbon dioxide. Green Chem 11(7) 1013—1017... 

Tian J-S, Miao C-X, Wang J-Q et al (2007) Efficient synthesis of dimethyl carbonate from methanol, propylene oxide and C02 catalyzed by recyclable inorganic base/phosphonium halide-functionalized polyethylene glycol. Green Chem 9(6) 566—571... 

In contrast, yellow iron oxide begins to lose its water of hydration above 177°C and converts to Fe203. Consequently, its use in plastics is limited to low-temperature processes. It is well suited for weatherable flexible vinyl applications. At one time, truckloads of yellow iron oxides were used in the coloration of low-density polyethylene disposable green garbage bags. 

Polyethylene glycol (PEG) has drawn considerable attention as a green reaction medium for organic synthesis [92]. Alkynes are successfiilly employed for the synthesis of Qxs using PdCyCuCl2 as the catalyst system in PEG-400 and water (8 2 Scheme 2.14) [93], The solvent system assists the oxidation of the alkyne to form the 1,2-dione as the intermediate species that undergo PEG-assisted cyclocondensation with the 1,2-diamine to form the Qx. 

Tian, I Miao, C. Wang, J. Cai, F. Du, Y Zhao, Y He, L. Efficient Synthesis of Dimethyl Carbonate from Methanol, Propylene Oxide and COj Catalyzed by Recyclable inOrganic Base/Phosphonium Halide-Functionalized Polyethylene glycol. Green. Chem. 2007, 9, 566-571. 

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