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Citation: WANG Li-Qiong, ZHANG Zheng-Bo, LI Xiao-Yong, NIE Jin. Esterifications of Benzoic Acid with Alcohols over Yb(NTf₂)₃[J]. Chinese Journal of Applied Chemistry, ;2003, 20(3): 219-222. shu

Esterifications of Benzoic Acid with Alcohols over Yb(NTf₂)₃

1.
Department of Chemistry, Huazhong University of Science & Technology, Wuhan 430074

Corresponding author: NIE Jin,
Received Date: 4 September 2002
Available Online: 9 December 2002

Esterifications of benzoic acid with alcohols by using Yb(N(SO₂CF₃)₂)₃, abbr. Yb(NTf₂)₃ as a Lew is acid catalyst have been investigated as function of reaction time, reaction temperature, catalyst dosage, solvents and alcohol acid molar ratio. Under the optimum conditions:Yb(NTf₂)₃ 8%, molar ratio of alcohol to acid 7:1, reflux time 6 h, the yield of ethyl benzoate was over 99%.In the esterification reactions of benzoic acid with different structure alcohols Yb(NTf₂)₃ demonstrated much higher catalytic activity than traditional catalysts such as concentrated H₂SO₄, FeCl₃, SnCl₂, and even Yb(OTf)₃.
- direct esterifications,
- Lew is acid catalyst,
- Yb(NTf₂)₃
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Esterifications of Benzoic Acid with Alcohols over Yb(NTf₂)₃