KF/Al<sub>2</sub>O<sub>3</sub>Mediated Multicomponent Reactions for the Efficient Synthesis of Highly Substituted Dihydropyridines
作者:Suman Pal、Md. Nasim Khan、Lokman H. Choudhury
DOI:10.1002/jhet.1914
日期:2014.8
KF/Al2O3 was found to be an efficient solid supported catalyst for the facile access of highlysubstituteddihydropyridine derivatives from the multicomponentreaction of aromatic aldehydes, amines, malononitrile, and alkylacetylenedicarboxylates. The notable advantages of this protocol are reusable catalyst, good yields, applicable to a wide range of substrates for the synthesis of pharmacologically interesting
Fe3O4@SiO2-NH2 Nanocomposite as a Robust and Effective Catalyst for the One-pot Synthesis of Polysubstituted Dihydropyridines
作者:Mohammad Ali Ghasemzadeh、Mohammad Hossein Abdollahi-Basir
DOI:10.17344/acsi.2016.2386
日期:2016.9.15
A practical, simple and efficient method for the synthesis of polysubstituted dihydropyridines was described via multicomponent reactions of aldehydes, arylamines, dimethyl acetylenedicarboxylate and malononitrile/ ethyl acetoacetate in the presence of Fe3O4@SiO2-NH2 nanocomposites. The present methodology provides a novel and efficient method for the synthesis of dihydropyridine derivatives with some advantages, such as excellent yields, short reaction times, recoverability and low catalyst loading. The nanomagnetic catalyst could be readily recovered using an external magnet and reused several times without any significant loss in activity. The catalyst was fully characterized by FT-IR, SEM, XRD, EDX and VSM analysis.
One-Pot Multicomponent Reactions for the Efficient Synthesis of Highly Functionalized Dihydropyridines
作者:Suman Pal、Lokman H. Choudhury、Tasneem Parvin
DOI:10.1080/00397911.2011.618283
日期:2013.3.1
atom-economic, one-pot protocol has been developed for the synthesis of highlyfunctionalized dihydropyridines via four-component reactions of aromatic aldehydes, arylamines, malononitrile, and dimethylacetylenedicarboxylate in the presence of sodium hydroxide in ethanol. This domino reaction proceeded smoothly in good to excellent yields and offered several advantages, including short reaction time, simple