WU, Liqiang; YANG, Limin; YAN, Fulin. Synthesis of 2,3-Dihydro-4-pyridones Using HClO4-SiO2 or NaHSO4-SiO2 as an Efficient Heterogeneous Catalyst. Asian Journal of Chemistry, [S. l.], v. 22, n. 9, p. 6977–6982, 2010. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/11937. Acesso em: 4 jul. 2024.