Two synthesis approaches of Fe-containing intercalated montmorillonites: Differences as acid catalysts for the synthesis of 1,5-benzodeazepine from 1,2-phenylenediamine and acetone

Tuning the Catalytic Performance of Novel Composites Based on ZIF‐8 and Nafen through Dimensional and Concentration Effects in the Synthesis of Propylene Glycol Methyl Ether

“…It is well known, , that the number of basic sites allows one to adjust the reaction selectivity toward PGME, i.e. the larger the number of these sites, the higher the isomer selectivity to PGME.…”

“…Different catalytic systems relevant to this process are reported in the literature. These systems include alkaline catalysts (hydroxides of alkali and alkaline‐earth metals),, amino‐functionalized SiO 2 , immobilized ionic liquid 1,1,3,3‐tetramethylguanidinium lactate on bentonite and SBA‐15 (IL/Support),, M x O y (M – Cu, Fe, Zn, Sn, and Ni), MgO,, metal phosphate molecular sieves, Al‐, Ga‐, Zr‐, and Zr, Al‐pillared clays (PILCs), natural and synthetic layered double hydroxides (LDHs) …”

Synthesis and characterization of an efficient and stable Al/Fe pillared clay catalyst for the catalytic wet air oxidation of phenol

“…28 These ndings were similar to those reported in the literature for single and mixed metal oxides of Al and Fe pillared bentonite clay. 1,29,30 The pH point of zero charge (pH zpc ) of the catalyst is an important parameter to determine the pH at which the surface has net electrical neutrality and surface charge plays a main role in the adsorption of ionisable pollutants into catalyst from aqueous solutions. The surface charge results of the natural and pillared bentonite clay used in this study are shown in Fig.…”

Enhanced Catalytic Properties of Carbon supported Zirconia and Sulfated Zirconia for the Green Synthesis of Benzodiazepines

“…An analysis of the 1 H NMR spectra of the crude, when the reaction was achieved in the presence of Zr, demonstrated the almost exclusive presence of a new product whose structure was assigned to compound 4 b by the presence of two signals in the aromatic region, at δ 6.41 and 6.24 ppm as multiplets, and a singlet at 1.49 ppm corresponding to methyl groups. Interestingly, intermediate compound 4 a was not detected …”

“…Benzodiazepines are considered as relevant nitrogen heterocyclic systems and their importance is related to diverse pharmacological activities: anti‐inflammatory, antiviral, analgesic, anti‐microbial, sedative, hypnotic, anti‐depressive, anti‐tumor, anti‐HIV, and also effective on cardiovascular disorders, etc . Different homogeneous catalysts, mainly consisting of metal transition salts, and also heterogeneous ones, operating under a great variety of reaction conditions have been applied in the synthesis of benzodiazepines from o ‐phenylendiamine and ketones Among the most important heterogeneous catalytic systems, it can be cited: zeolites, Al‐MCM‐41 and Cu(BDC), H‐MCM‐22, SiO 2 supporting H 2 SO 4 and HClO 4 , clays and even SZ …”