Affiliation:
1. Department of Applied Chemistry School of Engineering Tohoku University 6-6-07 Aoba Aramaki Aoba-ku Sendai 980-8579 Japan
2. Research Center for Rare Metal and Green Innovation Tohoku University 468-1 Aoba Aramaki Aoba-ku Sendai 980-0845 Japan
3. Advanced Institute for Materials Research (WPI-AIMR) Tohoku University 2-1-1 Katahira 2-1-1 Aoba-ku Sendai 980-8577 Japan
Abstract
AbstractOxidation of 2‐hydroxycyclohexanone (2‐HCO) which can be synthesized from both petroleum and biomass was investigated with heteropolyacids and oxygen as catalysts and oxidant, respectively. 2‐Hydroxyadipic acid (2‐HAA) was obtained in moderate yields, and H4PVW11O40 gave the highest yield (39 %). 2‐HAA is a dicarboxylic acid expected to be a monomer, and this work is the first report for production of 2‐HAA by catalytic oxidation reactions. The oxidation of 1,2‐cyclohexanedione (CHDO), which is a potential intermediate of 2‐HCO oxidation, produced similar yield of 2‐HAA even without catalyst. The effects of catalyst amount (first order), oxygen pressure (almost zero order) and the addition of radical scavenger (no effect) on the 2‐HCO oxidation with H4PVW11O40 catalyst were similar to those in a related case of 2‐methoxycyclohexanone oxidation to adipic acid with heteropolyacid catalyst. 2‐HCO is proposed to be oxidized to CHDO as a precursor of 2‐HAA in a similar mechanism to 2‐methoxycyclohexanone oxidation.
Subject
Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Catalysis
Cited by
1 articles.
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