plexes anchored into the channels of mesoporous mate- rial SBA-15 were prepared for chemical transformation of cyclopentene, and characterized in details. Spectra 29 13 of Si NMR, C NMR and XPS revealed the organic ligands were grafted into the SBA-15 and Pd(II) complexes formed. Spacial diversity of the complexes, especially dis- A new heterogeneous reaction system was developed for tances from –C=O to N on pyridyl cycles, may influence the catalytic oxidation of cyclopentene to cyclopentanone electronic distribution of conjugated system and further the by molecular oxygen over novel catalysts. The synthesized catalytic activity. With the help of the newly synthesized catalysts are comprised of Pd(II)-picolinamide complexes catalytic materials, a new heterogeneous oxidation system anchored into the channels of SBA-15. The new system was developed for selective catalytic transformation of was efficient for the mentioned reaction, and the catalysts cyclopentene to cyclopentanone with molecular oxygen as were reusable. the sole oxidant. Analytic results of the reaction mixtures indicated that all catalysts exhibited high activity, while the Keywords Cyclopentene oxidation · Pd(II)-complexes · cat.1 and cat.2 with 2-pyridinecarbonyl or 3-pyridinecar- Heterogeneous catalysis · Cyclopentanone bonyl on the ligands gave better yields of cyclopentanone. 96.2% conversion of cyclopentene and 76.3% yied of cyclo- pentanone
Catalysis Letters – Springer Journals
Published: Jul 6, 2017
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