期刊
GREEN CHEMISTRY
卷 24, 期 13, 页码 5116-5124出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2gc01296k
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资金
- Federal Ministry of Food and Agriculture (BMEL) [2220HV053C]
A novel and scalable protocol for synthesizing para-benzoquinones from inexpensive phenols has been reported. This protocol eliminates the need for catalysts, mediators, or terminal chemical oxidizers, significantly reducing waste production. Electricity is utilized as a sustainable and reagent-free oxidant, resulting in excellent selectivity. The effect of protic additives on the oxidation process has been studied and utilized to optimize the reaction outcome. Additionally, a flow protocol has been developed, allowing for continuous production under mild, ambient conditions. The method has been demonstrated to be versatile, with yields up to 99% in 26 examples, and has shown scalability on a gram-scale without corrosion.
A novel and scalable protocol for the synthesis of para-benzoquinones from inexpensive phenols is reported. In advancement of previous methods, the oxidation is performed free of catalyst, mediator or terminal chemical oxidizer, effectively minimizing waste. Electricity serves as a sustainable, reagent-free oxidant and enables excellent selectivity. The complex effect of protic additives on the oxidation is studied and utilized to optimize the reaction outcome. A basis for continuous production is provided by the development of a flow protocol, which is operable at mild, ambient conditions. Moreover, the versatility of the method was demonstrated for 26 examples in yields up to 99%. The scalability of the reaction was proven on gram-scale without corrosion in yield.
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