Synthesis 2022; 54(03): 770-778
DOI: 10.1055/a-1580-9688
paper

One-Pot Synthesis of 4H-Pyrano[3,2-c]coumarin Derivatives Catalyzed by Deep Eutectic Solvent

Zongbo Xie
a   Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, China
b   School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, China
,
Hongxia Li
a   Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, China
b   School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, China
,
Jiangnan Yang
a   Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, China
b   School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, China
,
Xiao Zhu
a   Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, China
b   School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, China
,
Zhanggao Le
a   Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, China
b   School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, China
› Author Affiliations
This project was supported by the National Natural Science Foundation of China (Nos. 11765002, 21966003) and the Science and Technology Project of Jiangxi (No. 20192BBH80012).


Abstract

4H-Pyrano[3,2-c]coumarin derivatives are an important class of pharmaceutical compounds that are expensive to prepare by previously reported methods. An efficient and green method was developed to obtain these derivatives using the deep eutectic solvent (DES) zinc chloride/acetamide (n:n = 1:4), which acted as both the catalyst and the solvent for the reaction. An aromatic aldehyde, 4-hydroxycoumarin, and cyanoacetate were used as the substrates. The DES, substrate molar ratio, diluent type, temperature, and reaction time were optimized to obtain the 4H-pyrano[3,2-c]coumarin derivatives from a range of aromatic aldehydes in a single step in moderate to high yields and under mild reaction conditions.

Supporting Information



Publication History

Received: 26 June 2021

Accepted after revision: 09 August 2021

Accepted Manuscript online:
09 August 2021

Article published online:
13 October 2021

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