Copper catalyzed N-arylation between aryl halides and nitriles in water: an efficient tandem synthesis of benzanilides

Gold-Catalyzed C-N Cross-Coupling Reactions of Aryl Iodides with Alkyl Nitriles or Silver Cyanate

We have gold-catalyzed C-N cross-couplings of aryl iodides with aliphatic nitriles. Although nitriles are usually challenging nitrogen cross-coupling partners, they could be activated by base-mediated deprotonation and isomerization. The method utilizes widely available substrates in moderate to good yields to provide various N-aryl compounds. In addition, a similar strategy could be extended to the cross-couplings of aryl iodides with silver cyanate. The protocol features high humidity/air tolerance and works inter- and intramolecularly.

One-pot synthesis of 3-aminofurans using a simple and efficient recyclable CuI/[bmim]PF6 system

A one-pot three-component reaction of several 2-ketoaldehydes, secondary amines and terminal alkynes to access 3-aminofurans proceeded well in [bmim][PF₆] using a simple and cheap CuI catalyst. The resultant 3-aminofuran products were easily isolated using diethyl ether and the CuI/[bmim][PF₆] system was reused six times with a slight decrease in the activity.

Chemoselective Cu-catalyzed synthesis of diverse N-arylindole carboxamides, β-oxo amides and N-arylindole-3-carbonitriles using diaryliodonium salts

Chemoselective copper-catalyzed synthesis of diverse N-arylindole-3-carboxamides, β-oxo amides and N-arylindole-3-carbonitriles from readily accessible indole-3-carbonitriles, α-cyano ketones and diaryliodonium salts has been developed. Diverse N-arylindole-3-carboxamides and β-oxo amides were successfully achieved in high yields under copper-catalyzed neutral reaction conditions, and the addition of an organic base (DIPEA) resulted in a completely different selectivity pattern to produce N-arylindole-3-carbonitriles. Moreover, the importance of the developed methodology was realized by the synthesis of indoloquinolones and N-((1H-indol-3-yl)methyl)aniline and by a single-step gram-scale synthesis of the naturally occurring cephalandole A analogue.

Design, synthesis, in-silico studies and biological screening of quinazolinone analogues as potential antibacterial agents against MRSA

Type or The emergence of resistance to antibiotic has developed a complicated situation in the treatment of bacterial infections. Considering the antimicrobial resistance phenomenon as one of the greatest challenge of medicinal chemists for search of better anti-bacterial agents, which have potential narrow spectrum activity with low development of resistance potential and low toxicity to host. Cross-linking of peptidoglycan is a key step catalyze by Penicillin binding protein (PBP) to maintain integrity of cell wall in bacterial cell. However, these Penicillin binding protein (PBP) has developed resistance in methicillin-resistant Staphylococcus aureus (MRSA) due to acquisition of additional PBP2a. Various Quinazolinone analogues are reported in literature as potential anti-bacterial agents against MRSA. In present study new quinazolinone analogues has been designed, guided by molecular docking, In-silico and MM-GBSA study. Newly designed molecules have been synthesized by medicinal chemistry route and their characterization was done by using IR, NMR, & HR-MS techniques. Biological evaluation of synthesized compounds has been done on wild type Gram-negative (Escherichia coli), Gram-positive (Staphylococcus aureus) and resistant MRSA bacterial strains using Streptomycin, Kanamycin and Linezolid as standard drugs respectively. The in vitro evaluation results have shown that compound 5f is active with MIC value 15.625 μg/mL against S. aureus and with MIC value 31.25 μg/mL against MRSA.

Palladium-catalyzed oxidative amidation of quinoxalin-2(1H)-ones with acetonitrile: a highly efficient strategy toward 3-amidated quinoxalin-2(1H)-ones

A novel and convenient palladium-catalyzed direct oxidative amidation of quinoxalin-2(1H)-ones with acetonitrile was developed to synthesize 3-amidated quinoxalin-2(1H)-ones. A series of 3-acetamino quinoxalin-2(1H)-one derivatives were constructed with good to excellent yields. This methodology provided a practical approach to various 3-acetamino quinoxalin-2(1H)-ones from the readily available starting material acetonitrile.

Deciphering the mechanism of copper-catalyzed N-arylation between aryl halides and nitriles: a DFT study

The mechanism of the CuI/DMEDA-catalyzed tandem hydrolysis/N-arylation of benzonitrile with aryl iodide was studied using the DFT method.

Ionic liquid/water mixture promoted organic transformations

Wet ILs constitutes a new class of solvents with their own new and interesting properties. The IL–water mixing makes it easy to control the properties of the solution and the formation of these ionic liquid mixtures increases synthetic flexibility.

An efficient magnetic copper ferrite nanoparticle catalysed ligand and solvent free synthesis of N-aryl amide from aldoximes and iodobenzene

A one pot dehydration, hydration and coupling reaction protocol for N-substituted amide formation.

Synthesis of a copper(ii) complex covalently anchoring a (2-iminomethyl)phenol moiety supported on HAp-encapsulated-α-Fe2O3 as an inorganic–organic hybrid magnetic nanocatalyst for the synthesis of primary and secondary amides

A novel hydroxyapatite-encapsulated-α-Fe₂O₃-based Cu(ii) organic–inorganic hybrid (interphase) catalyst was prepared.

Synthesis of amides through an oxidative amidation of tetrazoles with aldehydes under transition-metal-free conditions

An inexpensive and efficient synthesis of amides was developed via directly oxidative amidation of tetrazoles with aldehydes under transition-metal-free conditions.