Deep eutectic solvent choline chloride·2CrCl3·6H2O: an efficient catalyst for esterification of formic and acetic acid at room temperature

Jin Cao; Bin Qi; Jun Liu; Yuhan Shang; Huiwen Liu; Wenjing Wang; Jia Lv; Zhiyan Chen; Haibo Zhang; Xiaohai Zhou

doi:10.1039/C6RA01029F

Deep eutectic solvent choline chloride·2CrCl₃·6H₂O: an efficient catalyst for esterification of formic and acetic acid at room temperature†

Jin Cao,^a Bin Qi,^a Jun Liu,^b Yuhan Shang,^a Huiwen Liu,^a Wenjing Wang,^a Jia Lv,^a Zhiyan Chen,^a Haibo Zhang*^a and Xiaohai Zhou^a

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^a College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
E-mail: haibozhang1980@gmail.com

^b Hunan University of Arts and Science, Changde, China

Abstract

A highly efficient and selective method for esterification of formic and acetic acid with alcohols has been achieved at room temperature, with the choline chloride (ChCl)/chromium(III) chloride hexahydrate (CrCl₃·6H₂O) deep eutectic solvent as a catalyst. High yields and good selectivities of organic esters are obtained using DES [ChCl][CrCl₃·6H₂O]₂ with the molar ratio 5 : 1 (carboxylic acids : alcohols) at room temperature in 24 h. The ease of recovery and reusability of DES with high catalytic activity makes this method efficient and practical.

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Deep eutectic solvent choline chloride·2CrCl₃·6H₂O: an efficient catalyst for esterification of formic and acetic acid at room temperature†

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Deep eutectic solvent choline chloride·2CrCl₃·6H₂O: an efficient catalyst for esterification of formic and acetic acid at room temperature

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