Uranyl-silicotungstate-containing hybrid building units {α-SiW9} and {γ-SiW10} with excellent catalytic activities in the three-component synthesis of dihydropyrimidin-2(1H)-ones

Jian-Hua Ding; Yu-Feng Liu; Zhao-Teng Tian; Pei-Jie Lin; Feng Yang; Ke Li; Guo-Ping Yang; Yong-Ge Wei

doi:10.1039/D2QI02653H

Uranyl-silicotungstate-containing hybrid building units {α-SiW₉} and {γ-SiW₁₀} with excellent catalytic activities in the three-component synthesis of dihydropyrimidin-2(1H)-ones†

Jian-Hua Ding,‡^a Yu-Feng Liu,‡^a Zhao-Teng Tian,^a Pei-Jie Lin,^a Feng Yang,^c Ke Li,

*^a Guo-Ping Yang

*^ab and Yong-Ge Wei

*^b

Author affiliations

* Corresponding authors

^a School of Chemistry, Biology and Material Science, Jiangxi Province Key Laboratory of Synthetic Chemistry, Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China
E-mail: like90@foxmail.com, erick@ecut.edu.cn

^b Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China
E-mail: yonggewei@mail.tsinghua.edu.cn

^c School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, China

Abstract

A novel uranyl-containing polytungstate, {K_4.2Na_18.9H_0.9(H₂O)₂₀[K₄(UO₂)₃(H₂O)₆(α-SiW₉O₃₄)(γ-SiW₁₀O₃₆)₃]}·ca.16H₂O (U₃), was synthesized using the Keggin-type precursor [γ-SiW₁₀O₃₆]⁸⁻ ({γ-SiW₁₀}) and UO₂(OAc)₂ and was further characterized by single-crystal X-ray diffraction and various techniques. Single crystal X-ray diffraction analysis showed a quadrahedron-like structure of U₃ with interesting tarot-like (top view) and crown-like (side view) views, among which one central {K₄(UO₂)₃(H₂O)₃} cluster was surrounded by one {α-SiW₉} and three {γ-SiW₁₀} building units. In addition, a more significant aspect is that U₃ shows good catalytic activity in the dehydration condensation of aldehydes, acetoacetates, and urea to green synthesize dihydropyrimidin-2(1H)-ones. The advantages of this transformation include solvent-free conditions, water as the sole by-product, available starting materials, good compatibility, and operational simplicity.

This article is part of the themed collection: FOCUS: Metal and Metal-Containing Clusters

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Article information

DOI: https://doi.org/10.1039/D2QI02653H
Article type: Research Article
Submitted: 13 12 2022
Accepted: 28 1 2023
First published: 01 2 2023

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Inorg. Chem. Front., 2023,10, 3195-3201

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Uranyl-silicotungstate-containing hybrid building units {α-SiW₉} and {γ-SiW₁₀} with excellent catalytic activities in the three-component synthesis of dihydropyrimidin-2(1H)-ones

J. Ding, Y. Liu, Z. Tian, P. Lin, F. Yang, K. Li, G. Yang and Y. Wei, Inorg. Chem. Front., 2023, 10, 3195 DOI: 10.1039/D2QI02653H

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