Chinese Journal of Applied Chemistry

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SU Ce*, XIA Shujiao, WANG Rui   

  1. (College of Petro-Chemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
  • Received:2013-03-06 Revised:2013-05-06 Published:2014-02-10 Online:2014-02-10
  • Contact: su

Abstract: Using air as the ultimate oxidant, a facile method for the oxidative esterification of para-nitrobenzaldehyde has been developed. The results demonstrated that the catalyst precursors, catalyst loadings and solvents have considerably effects on both the yields and reaction rates. A variety of para-nitrobenzonates were conveniently prepared with the yields of 36%~64% under the optimal reaction conditions, where the corresponding alcohols were used as the solvents, and the 3-ethyl-4-methyl-5-hydroxyethyl thiazole bromide salt as the catalyst precursor, with 10% molar fraction catalyst loading. Modest yields of 9%~29% were obtained if only stoichiometric amount alcohol was used.

Key words: N-heterocyclic carbenes, para-nitrobenzaldehyde, oxidative esterification, nitrobenzoic acid esters

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