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N2O4 chemisorbed onto N-Propylsilica kryptofix 21 and kriptofix 22 as two new functional polymers for the fast oxidation of urazoles and 1,4-dihydropyridines


3-Chloropropylsilica was reacted with Kriptofix 21 or 22 in the presence of triethylamine to form N-propylsilica Kryptofix 21 and Kriptofix 22. Then N2O4 was added to each of these polymers to chemisorb onto cavity of aza-crown ethers. These functionalized polymers were applied for the fast and simple oxidation of urazoles and 1,4-dihydropyridines, respectively.

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