An efficient one-pot method for the synthesis of 1,4-dihydropyridines from \beta-dicarbonyl compounds, aldehyde, and ammonium acetate is reported using sulfonic acid-functionalized silica at 90 °C under solvent-free conditions with good to excellent yields. The catalyst is easily prepared, stable (up to 300 °C), reusable, and efficiently used under reaction conditions.
1, 4-Dihydropyridine, \beta-dicarbonyl compounds, solid acid, SiO_2-R-SO_3H, heterogeneous catalyst
MOHAMMADI, BEHZAD; JAMKARANI, SAYYED MOHAMMAD HOSSEINI; KAMALI, TAGHI A.; NASROLLAHZADEH, MAHMOUD; and MOHAJERI, ALI
"Sulfonic acid-functionalized silica: a remarkably efficient heterogeneous reusable catalyst for the one-pot synthesis of 1,4-dihydropyridines,"
Turkish Journal of Chemistry: Vol. 34:
4, Article 13.
Available at: https://journals.tubitak.gov.tr/chem/vol34/iss4/13