US EPA

8387266 

Journal Article 

Synthesis of β-cyclodextrin supported 2, 2, 6, 6-tetramethylpiperidine-1-oxyl and its catalytic performance on the oxidation of alcohols with molecular oxygen as oxidant 

Huo, WG; Yang, M; Zhai, L; Zhao, JQ; Zhang, YC 

2016 

Journal of Molecular Catalysis
ISSN: 0304-5102 

Science Press 

30 

4 

307-316 

Chinese 

2, 2, 6, 6-Tetramethylpiperidine-1-oxyl was supported on β-cyclodextrin with ethylenediamine as a linker and an immobilized catalyst β-CD-TEMPO was obtained. The β-CD-TEMPO was characterized by 1H NMR, 13C NMR and FT-IR. The β-CD-TEMPO in combination with CuBr2 and K2CO3 as a catalytic system was applied to the selective oxidation of alcohols with molecular oxygen as an oxidant, and showed high activity and selectivity in oxidation of primary benzyl alcohols and allyl alcohols. The ethylenediamine moiety in the immobilized catalyst acts as both a linker and a liand to coordinate with copper ion, which makes the oxidation reaction proceed smoothly. The immobilization of TEMPO on β-cyclodextrin allowed easy separation of the oxidation products (aldehydes) from the catalytic system, and the recovered catalyst can be recycled for several times directly. © 2016, Science Press. All right reserved. 

2, 2, 6, 6-tetramethylpiperidine-1-oxyl (TEMPO); Alcohol oxidation; Immobilization; Molecular oxygen; β-cyclodextrin (β-CD)