Issue 11, 2023

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

Abstract

A novel uranyl-containing polytungstate, {K4.2Na18.9H0.9(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.

Graphical abstract: 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

Supplementary files

Article information

Article type
Research Article
Submitted
13 12 2022
Accepted
28 1 2023
First published
01 2 2023

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

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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