期刊
CATALYSIS LETTERS
卷 146, 期 11, 页码 2306-2312出版社
SPRINGER
DOI: 10.1007/s10562-016-1850-2
关键词
Phthalocyanine tetrasulfonate; Peroxymonosulfate; Thymol; Carvacrol; Oxidation < Processes and reactions
资金
- Anadolu University Scientific Research Commission, Turkey [1505F313]
The oxidation of thymol and carvacrol to thymoquinone with potassium peroxymonosulfate (KHSO5) catalyzed by iron phthalocyanine tetrasulfonate (FePcTS) in a methanol (4.0 mL)-water (0.5 mL) mixture has been carried out. In a typical reaction, the amounts of the substrate, oxidant, and catalyst were 0.300, 0.600, and 1 x 10(-3) millimoles, respectively. Ninety-nine percent conversions of thymol in 1 h and of carvacrol in 30 min were achieved at ambient temperature. The major product of both oxidation reactions was thymoquinone (2-isopropyl-5-methylbenzoquinone, TQ) and the reactions also yielded polymeric products poly(2-isopropyl-5-methyl-1,4-phenylene oxide) and poly(5-isopropyl-2-methyl-1,3-phenylene oxide). These polymers are novel and not reported before. When H2O2 or Bu (t) OOH was used as the oxidant, the yield of TQ was < 1 %.
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