N,N,N',N'-Tetramethyl-N,N'-bis(sulfo)ethane-1,2- Diaminium Mesylate ‎as a Highly Effective and Dual-functional Catalyst for the Synthesis of 1-Thioamidoalkyl-2-naphthols

TiO2/porous carbon as a new nanocomposite and catalyst for the preparation of 4H-pyrimido[2,1-b]benzimidazoles

“…In a suggested mechanism, which is supported by the literature, 5–25,41 ethyl acetoacetate reacted with aldehyde which is activated by TiO 2 /PCN to prepare intermediate (I). Then, 2-aminobenzimidazole is reacted with intermediate (I) to give (II).…”

“…Preventing the loss of energy, materials and solvent are some other advantages of this protocol. [6][7][8][9][10][11][12][13] Multi-component synthesis of 4H-pyrimido[2,1-b]benzazoles was reported using various catalysis such as, nano-[Co-4CSP] Cl 2 , 5 iron uoride, 14 Fe 3 O 4 @nano-cellulose/TiCl, 15 chitosan, 16 nano-Fe 3 O 4 @SiO 2 -TiCl 3 , 17 H 3 PO 4 -Al 2 O 3 , 18 nano-TiCl 2 /cellulose, 19 acetic acid, 20 TMGT, 21 1,3-disulfonic acid imidazolium triuoroacetate, 22 [bmim]BF 4 , 23 GO@PSA-Cu 24 and poly (vinylpyrrolidonium) perchlorate. 25 Due to importance of 4H-pyrimido[2,1-b]benzimidazoles, the nd of the more efficient method for the preparation of these signicant compounds are still needed.…”

Synthesis of Novel Pyrimido[4,5-b] Quinolines Containing Benzyloxy and 1,2,3-Triazole Moieties by DABCO as a Basic Catalyst

“…Uracil derivatives are used in drug discovery with a wide range of biological activities and synthetic accessibility . Antiviral, antitumor, herbicidal, insecticidal, and bactericidal properties are other activities which reported for these compounds …”

“…12 Uracil derivatives are used in drug discovery with a wide range of biological activities and synthetic accessibility. 13 Antiviral, antitumor, 14 herbicidal, insecticidal, and bactericidal properties are other activities which reported for these compounds. 13 An important strategy for the preparation of pyrimido [4,5b]quinolines, which complies with green chemistry protocols, is the one-pot multi-component condensation reaction of dimedone, 6-amino-1,3-dimethyluracil and aldehydes.…”

Design and Preparation of Copper(II)–Mesalamine Complex Functionalized on Silica-Coated Magnetite Nanoparticles and Study of Its Catalytic Properties for Green and Multicomponent Synthesis of Highly Substituted 4H-Chromenes and Pyridines

“…Magnetic nanoparticles (MNPs) and cleaner production methods are applied in a wide field of chemical sciences. − MNPs can be recovered through a simple separation process using an external magnetic field. − Another advantage of magnetic nanocatalysts is that by changing the size, shape, or composition of MNPs, their properties and characteristics can be controlled, which facilitates their wide range of applications in various fields . To achieve greater stability and to create a suitable substrate for different types of catalysts, various methods have been used to change the surface of MNPs and then stabilize the catalysts on them.…”