@article{Chen2026, 
author = {Xuejiao Chen and Fuhua Zhang and Jiawei Cao and Zhibin Zhang and Guoping Yang},
title = {Sandwich-type thorium-substituted phosphotungstate for the catalytic synthesis of aza-heterocycles},
year = {2026},
journal = {Polyoxometalates},
volume = {5},
number = {2},
pages = {9140121},
keywords = {polyoxometalates, thorium, catalysis, aza-heterocycles},
url = {https://www.sciopen.com/article/10.26599/POM.2026.9140121},
doi = {10.26599/POM.2026.9140121},
abstract = {A novel sandwich-type thorium-substituted phosphotungstate, [H2N(CH3)2]10[Th(PW11O39)2]·24H2O (ThP2W22), was synthesized and fully characterized. The structure consists of two monolacunary Keggin-type [PW11O39]7− units bridged by an eight-coordinate Th4+ center. ThP2W22 functions as an efficient Lewis acid catalyst for the synthesis of 2,3-dihydroquinazolinones via cyclization of 2-aminobenzamides with aldehydes. A series of quinazolinone derivatives was obtained in high yields (75%–92%) under mild and green reaction conditions. Control experiments indicate a synergistic interaction between the Th4+ center and the polyoxometalate framework, highlighting the potential of thorium-containing polyoxometalates as catalysts for heterocycle synthesis.}
}