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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 50, 2020 - Issue 20
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Articles

Polyphosphoric acid-promoted synthesis of coumarins lacking substituents at positions 3 and 4

Li-Shou Yanga State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, P. R. China;b The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, P. R. ChinaORCID Iconhttps://orcid.org/0000-0002-7148-9291View further author information
ORCID Icon,
Yu Wanga State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, P. R. China;b The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, P. R. ChinaView further author information
,
En-Hua Wangc Department of Medicine and Food, Guizhou Vocational College of Agriculture, Guiyang, PR ChinaView further author information
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Jan Yanga State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, P. R. China;b The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, P. R. ChinaView further author information
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Xiong Pana State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, P. R. China;b The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, P. R. ChinaView further author information
,
Xiu Liaoa State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, P. R. China;b The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, P. R. ChinaView further author information
&
Xiao-Sheng Yanga State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, P. R. China;b The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, P. R. ChinaCorrespondence[email protected]
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Pages 3080-3085 | Received 26 Apr 2020, Published online: 20 Jul 2020
 
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Abstract

Coumarins have recently emerged as a hot topic of research due to their diverse pharmacological properties. This work described a method for the synthesis of 3,4-diunsubstituted coumarins promoted by polyphosphoric acid (PPA) from salicylaldehydes and acetic anhydride. Various coumarins were produced in good to excellent yields.

Graphical Abstract

Acknowledgment

The authors are grateful for the help provided by the staff at the Key Laboratory of Chemistry for Natural Products of Guizhou Province and the Chinese Academy of Sciences.

Additional information

Funding

The work here was supported by the National Natural Science Foundation of China [No. 81860609], the Guizhou Provincial Natural Science Foundation [No. QKHJC[2019]1213], the High-level Innovative Talents Training in Guizhou Province [No. 2015-4027] and the Project of Guizhou Science and Technology Platform and Talent Team Under Grant [No. QKHPTRC[2017]5614].

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