期刊
CHEMICAL COMMUNICATIONS
卷 53, 期 63, 页码 8850-8853出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cc04209d
关键词
-
资金
- National Key Research and Development Program of China [2017YFA0403103]
We explored the oxidation reactions of lignin model compounds directly induced by ionic liquids under metal-free conditions. In this work, it was found that ionic liquid 1-octyl-3-methylimidazolium acetate as a solvent could promote the aerobic oxidation of lignin model compound 2-phenoxyacetophenone (1) and the yields of phenol and benzoic acid from 1 could be as high as 96% and 86%, respectively. A possible reaction pathway was proposed based on a series of control experiments. An acetate anion from the ionic liquid attacked the hydrogen from the beta-carbon thereby inducing the cleavage of the C-O bond of the aromatic ether. Furthermore, it was found that 2-2-methoxyphenoxy)-1-phenylethanone (4) with a methoxyl group could also be transformed into aromatic products in this simple reaction system and the yields of phenol and benzoic acid from 4 could be as high as 98% and 85%, respectively. This work provides a simple way for efficient transformation of lignin model compounds.
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