Zirconyl triflate as an efficient and reusable catalyst for one-pot synthesis of 1-amidoalkyl-2-naphthols under solvent-free conditions

New magnetic nanocomposite Fe3O4@Saponin/Cu(II) as an effective recyclable catalyst for the synthesis of aminoalkylnaphthols via Betti reaction

In this research, a new magnetic nanocomposite Fe₃O₄@Saponin/Cu(II) based on quillaja saponin was prepared and the catalyst structure was characterized thoroughly using FT-IR, EDS, TGA, XRD, VSM, HR-TEM, SEM, ICP, BET analyzes. The catalyst prepared in the three-component synthesis of several Betti bases, 1-(α-aminoalkyl)naphthols, under environmentally friendly conditions was used. The advantage of this reaction is the high efficiency of the products and the short reaction time. Furthermore, Fe₃O₄@Saponin/Cu(II) nano-catalyst is recoverable magnetically and is reusable for other processes with no reduction in its activity.

Synthesis of Amidoalkyl Naphthols in PEG-400 as a Green and Efficient Solvent and Theoretical Study of their Spectroscopic Properties

Abstract:

An efficient synthesis of amidoalkyl naphthols from the multicomponent reaction of 2- naphthol, aromatic aldehydes, and benzamide derivatives using PEG-400 as an environmentally friendly solvent is described. The main advantage of this protocol is that the benzamide derivatives with low reactivity, such as 4-nitro benzamide, can react effectively. Also, the molecular structure, IR, and 13C NMR spectra of the synthesized compounds are also investigated theoretically. Density functional theory (DFT) calculations at the B3LYP level of theory are carried out to locate optimized geometries and calculate vibrational normal modes and 13C NMR chemical shifts. These calculations enable us to assign the observed FT-IR and 13C NMR peaks to the corresponding vibrational motions and 13C atoms, respectively.

One-pot three-component synthesis of 1-amidoalkyl naphthols and polyhydroquinolines using a deep eutectic solvent: a green method and mechanistic insight

The multicomponent synthesis of 1-amidoalkyl naphthols and polyhydroquinolines has been developed as an atom-economic procedure catalyzed by a deep eutectic solvent ([CholineCl][ZnCl₂]₃).

Mannich base-connected syntheses mediated by ortho-quinone methides

This article provides an overview about specifically modified Mannich reactions where the process involves an ortho-quinone methide (o-QM) intermediate. The reactions are classified on the basis of the o-QM source followed by the reactant, e.g., the dienophile partner in cycloaddition reactions (C=C or C=N dienophiles) or by the formation of multicomponent Mannich adducts. Due to the important pharmacological activities of these reactive o-QM intermediates, special attention is paid to the biological activity of these compounds.

Homopiperazine sulfamic acid functionalized mesoporous silica nanoparticles (MSNs-HPZ-SO3H) as an efficient catalyst for one-pot synthesis of 1-amidoalkyl-2-naphthols

MSNs-HPZ-SO₃H was synthesized, characterized, and employed as an efficient nanocatalyst in one-pot synthesis of 1-amidoalkyl-2-naphthols.

Sulfanilic acid-functionalized silica-coated magnetite nanoparticles as an efficient, reusable and magnetically separable catalyst for the solvent-free synthesis of 1-amido- and 1-aminoalkyl-2-naphthols

Sulfanilic acid-functionalized silica-coated magnetite nanoparticles as an efficient, reusable and magnetically separable catalyst for the solvent-free synthesis of 1-amido- and 1-aminoalkyl-2-naphthols.