Wu L, Yang L, Yan F. Synthesis of 2,3-Dihydro-4-pyridones Using HClO4-SiO2 or NaHSO4-SiO2 as an Efficient Heterogeneous Catalyst. ajc [Internet]. 2010 Jul. 9 [cited 2024 Jul. 4];22(9):6977-82. Available from: https://asianpubs.org/index.php/ajchem/article/view/11937