4-Carboxy-TEMPO may be employed as catalyst for the oxidation of regenerated cellulose (viscose rayon) to cellouronic acid. 4-Carboxy-TEMPO is a 4-substituted 2,2,6,6-tetramethylpiperidyl-1-oxy (TEMPO) derivative. 4-carboxy-TEMPO immobilized with 3-aminopropylsilane on the mesoporous silica surface comprises heterogeneous catalytic system employed for various oxidation reactions.
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Marshall DL et al. Org Biomol Chem. 2011 Jul 7;9(13):4936-47.Chen YX et al. Angew Chem Int Ed Engl. 2008;47(48):9330-3
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