Synthesis 2022; 54(22): 4907-4916
DOI: 10.1055/a-1859-8012
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Palladium-Catalyzed Ligand-Free ortho-Deuteration of Aromatic Carboxylic Acids with D2O

Ziyin Zhang
a   School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, P. R. of China
b   School of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, P. R. of China
,
a   School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, P. R. of China
,
Yiwei Cao
a   School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, P. R. of China
,
Jia Chen
a   School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, P. R. of China
c   Ningbo Cuiying Chemical Technology Co. Ltd., Ningbo 315100, P. R. of China
,
a   School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, P. R. of China
› Author Affiliations
This work was supported by the Natural Science Foundation of Ningbo (Grant No. 202003N4310) and the Ningbo Municipal Bureau of Science and Technology under the CM2025 Programme (Grant No. 2020Z092). Z.-J.J. thanks the Start-up Foundation from NingboTech University (No. 20191114).


Abstract

A ligand-free, palladium-catalyzed ortho-deuteration of aromatic carboxylic acids was developed using D2O as the deuterium source. Compared to their meta-substituted analogues, an unusually lower reactivity in para- and ortho-substituted benzoic acids toward hydrogen isotope exchange was observed. Further investigation revealed that the reaction temperature is a critical parameter for the reactivity, and the modified conditions can afford deuterated products with good to excellent deuterium incorporation.

Supporting Information



Publication History

Received: 30 March 2022

Accepted after revision: 23 May 2022

Accepted Manuscript online:
23 May 2022

Article published online:
23 September 2022

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