Synthesis and characterization of Ni(ii)–Vanillin–Schiff base–MCM-41 composite as an efficient and reusable nanocatalyst for multicomponent reactions

Abstract

Ni(ii)–Vanillin–Schiff base–MCM-41 has been synthesized and characterized by XRD, TGA, BET, EDS, SEM, ICP-OES, TEM and FT-IR spectroscopy. This nanostructural catalyst has been applied for multicomponent reactions.

Ethylene diamine post‐synthesis modification on open metal site Cr‐MOF to access efficient bifunctional catalyst for the Hantzsch condensation reaction

“…The heterocyclic ring of 1,4‐Dihydropyridine (1,4‐DHPs) and polyhydroquinolines are among the most widely used wide range of biological and pharmaceutical activities such as anticancer, hepatoprotective, antiatherosclerotic, antitumor, antidiabetic activity, vasodilator and treatment of Alzheimer's disease . A number of solid materials as supports have broadly been investigated for the synthesis of polyhydroquinolines such as Mn@PMO‐IL, Ni(II)‐Vanillin‐MCM‐41, Co 3 O 4 ‐CNTs, HY‐Zeolite, and Glucosulfonic acid immobilized on Fe 3 O 4 (GSA@MNPs) have been used to facilitate these reactions. We have recently reported on the preparation of SBA‐15/SO 3 H nanoreactor as a highly efficient solid acidic catalyst for the synthesis of polyhydroquinolines .…”

Framework Copper Catalyzed Oxidative Synthesis of Quinazolinones: A Benign Approach Using Cu3(BTC)2 MOF as an Efficient and Reusable Catalyst

“…[6][7][8] Over the past decades, quinazolinones have been synthesized using various homogeneous transition metal-based catalysts such as vanadium, [9] irridium, [10] ironand cobalt catalysed redox condensation of ortho-substituted nitrobenzenes with amines, [11] palladium-catalyzed cyclocarbonylation with aryl halides [12] CÀ H amidation with benzyl alcohols [13] and copper-catalyzed condensation of 2-aminobenzamides with methylhetarene and2halobenzamide with arylnitrile. [14] Similarly, some of the heterogeneous catalytic systems such as carbon nanodots-iron oxide, [15] MCM-41 immobilized palladium, [16] ceria supported ruthenium, [17] vanillin-Schiff base-MCM-41 immobilized nickel [18] and by electrochemical process [19] were also reported for the synthesis of quinazolinones. Though several methodologies have been developed to achieve quinazolinone and its derivatives, most of them are suffering from its own limitations such as multistep procedure, corrosive or non-benign catalyst, stoichiometric amount of catalyst, arduous work-up, poor atom economy and relatively harsher reaction conditions.…”

Deep eutectic solvent an efficient reaction medium for the synthesis of chromeno pyrazolo and indazolo phthalazine derivatives

“…Due to such environmental benign properties of DES, it is used in many organic transformations . DES is a mixture of hydrogen bond acceptors (HBAs) such as choline chloride (ChCl), proline and hydrogen bond donors (HBDs) such as tartaric acid, oxalic acid, urea, inorganic salts, alcohols and amines or carbohydrates . The melting point of deep eutectic mixture is much lower than that of the individual components …”

“…[12,13] DES is a mixture of hydrogen bond acceptors (HBAs) [14] such as choline chloride (ChCl), proline and hydrogen bond donors (HBDs) [15] such as tartaric acid, oxalic acid, urea, inorganic salts, alcohols and amines or carbohydrates. [16][17][18][19][20] The melting point of deep eutectic mixture is much lower than that of the individual components. [21][22][23] Herein, we have used a mixture of biorenewable L-proline:oxalic acid dihydrate (1:1) as a DES.…”