Convenient Deoxygenation of Aromatic Ketones by Silica-Supported Chitosan Schiff Base Palladium Catalyst

Abstract

A novel and effective catalytic system, silica-supported chitosan Schiff base palladium complex (SiO₂–CS–Schiff base–Pd) was described for catalytic hydrogenation of aromatic ketones to corresponding hydrocarbons at ambient temperature and normal pressure of H₂.

GRAPHICAL ABSTRACT

Keywords:

• Aromatic ketones
• chitosan support
• hydrogenation
• palladium catalyst

ACKNOWLEDGMENTS

We thank the National Natural Science Foundation of China (No. 20772055) and the Doctor Foundation of Shandong Province (BS2010CL011) for financial support of this study.

Notes

^a Reaction conditions: 0.5 mL substrate, 0.2 g catalyst, 15 mL ethanol, 45 mL/min H₂, 313 K.

^b Conversion was determined by GC analysis.

^a Reaction conditions: 0.5 mL substrate, 0.2 g catalyst, 15 mL ethanol, 45 mL/min H₂, 313 K, 5 h.

^b Conversion was determined by GC analysis.

^c Some methyl ethers were observed.

^a Reaction conditions: 0.5 mL substrate, 0.2 g catalyst, 15 mL ethanol, 45 mL/min H₂, 5 h.

^b Conversion was determined by GC analysis.

^a Reaction conditions: 0.5 mL substrate, 0.2 g catalyst, 15 mL ethanol, 45 mL/min H₂, 313 K.

^b Conversion was determined by GC-MS analysis.

^a Conversion was determined by GC analysis.