title: Oxidation of Aromatic Aldehydes to Esters: A Sulfate Radical Redox System.
abstract: A mild oxidative esterification of various aromatic aldehydes by sulfate radical redox system was presented. In the reaction pathway exploration, the transiency of MeOSO3-was disclosed, which was generated from esterification between the in situ generated HSO4-and MeOH, a rate-limiting step in the process. More importantly, the selectivity-controlling step was represented by the subsequent nucleophilic displacement between MeOSO3-and aldehydes. The ionic oxidant 1a ((NH4)2S2O8) with more N-H numbers in the cation, as compared with 1c ((n-Bu4N)2S2O8) and 1d ((PyH)2S2O8), has better performance in the oxidative esterification of aldehydes.
authors.affiliation: Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, PR China.|College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences , Beijing 100049, PR China.
authors.forename: Ya-Fei
authors.initials: YF
authors.lastname: Guo
authors.affiliation: Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, PR China.|College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences , Beijing 100049, PR China.
authors.forename: Sajid
authors.initials: S
authors.lastname: Mahmood
authors.affiliation: Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Bao-Hua
authors.identifier: 0000-0002-7222-4383
authors.initials: BH
authors.lastname: Xu
authors.affiliation: Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Xiao-Qian
authors.initials: XQ
authors.lastname: Yao
authors.affiliation: Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Hong-Yan
authors.initials: HY
authors.lastname: He
authors.affiliation: Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Suo-Jiang
authors.identifier: 0000-0002-9397-954X
authors.initials: SJ
authors.lastname: Zhang