We report here a sequence of reactions for the synthesis of diversely substituted N-methylindolines from the corresponding N,N-dimethylaniline-N-oxides through a Polonovski–Mannich cyclization. Indolines are obtained in 47–61% yield from the corresponding aniline-N-oxides in one laboratory ope...
The reaction of lithiated N,N-dimethylaniline π-coordinated to Cr(CO)3 with W(CO)6 and alkylation with [Et3O][BF4] afforded the o-, m- and p-isomers of the σ,π-bimetallic complexes {η6-Me2NC6H4C(OEt)W(CO)5}Cr(CO)3 (o-, 1, m-, 2 and p-isomer, 3). A by-product of the reaction is found by the s...
A range of N,N-dimethylanilines were synthesized with excellent yields in one-pot by the hydrogenation and alkylation of nitroarenes with H2 and HCHO over quenched skeletal Cu catalyst, which provides a facile, economical, and environmentally benign alternative methodology for C-N bonds formation.
The formation of hydrogen bonded complexes of o-cresol (OC), m-cresol (MC) and p-cresol (PC) with N,N-dimethylaniline (DMA) in n-hexane solutions is investigated by ultrasonic velocity, density and dynamic viscosity measurements in the equimolar concentration of solutes ([cresol] = [DMA]) rangin...
Electrochemical oxidation and polymerization of N,N-dimethylaniline at a gold electrode have been studied in an acidic solution. Both potential cycling and electrolysis at a controlled potential yield a thin film of a polymer that shows electrochemical activity in acidic and pH-neutral solutions...
Densities and viscosities of pure sulfolane, aniline, N,N-dimethylaniline, N,N-diethylaniline and their binary mixtures with sulfolane as common component were measured over the entire composition range at T = (303.15, 308.15, and 313.15) K and atmospheric pressure. A high precision vibrating-tu...
In this study, densities and viscosities of four binary systems {aniline/N,N-dimethylaniline + 1-butyl-3-methylimidazolium triflate ([bmim][OTf])} and {aniline/N,N-dimethylaniline + 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([bmim][NTf2])} were measured at atmospheric pressur...
Using density functional theory (DFT) and time-dependent DFT (TD-DFT) methods, the current study reports the role of inserting acyclic and cyclic conjugated π-linkers in bis-N,N-dimethylaniline-based dyes as sensitizers in the dye-sensitized solar cells (DSSCs). Some optical and electron transf...
Nonheme iron(II) complex, [(N4Py*)FeII(CH3CN)](ClO4)2 (1) with pentadentate tetrapyridyl ligand (N4Py* = N,N-bis(2-pyridylmethyl)-1,2-di(2-pyridyl)ethylamine) has been shown to catalyze the oxidation of N,N-dimethylaniline (DMA) with H2O2, tert-butyl hydroperoxide (TBHP), peracetic acid (PAA), m...
An efficient iron-catalyzed dehydrogenative cross-coupling amidation/imidation reaction between N,N-dimethylanilines and amides/imides is reported. The protocol uses an inexpensive and readily available Fe(NO3)3·9H2O/O2 catalytic system in the absence of additional ligands at room temperature.
The ene-type reaction between (dithio)carboxylic acids and alkenes has been studied computationally by DFT and topological (analysis of the electron localization function, ELF) methods. The reaction proceeds under kinetic control and the observed differences in regioselectivity are well-explaine...
Interpretations of data from infrared, visible-ultraviolet, and 13C NMR spectra lead to the conclusion that there is extensive covalent bonding in dithiocarboxylates, 4, of eight-coordinated molybdenum(IV), [Mo(4)4], and suggest the presence of metal-to-ligand π backbonding, in contrast to the ...
The preparation and characterisation of complexes of 2-amino-5-nitrothiazole (ANT) with Co(II), Ni(II), Cu(II), Cd(II), Cu(I) and Ag(I) are described. From spectral data it is inferred that the complexes fall into two groups: those in which ANT is bound through the ring nitrogen, and those in wh...
The complexation of 2-amino-5-nitrothiazole, (ANT), a radiosensitizing drug has been studied with palladium. In methanol, the product is the square- planar complex, trans-[PdCl2(ANT)2] with the binding site being the ring nitrogen. In water, however, the product is the chelate, [Pd(ANT)2]Cl2, th...
Head group analogues of the antibacterial and antiparasitic drug nitazoxanide (NTZ) are presented. A library of 39 analogues was synthesized and assayed for their ability to suppress growth of Helicobacter pylori, Campylobacter jejuni, Clostridium difficile and inhibit NTZ target pyruvate:ferred...
Polymerizations of dodecylbenzenesulfonic acid aniline salt (DBSAn) in chloroform using various electron acceptors were studied as a function of polymer yield and conductivity. Dichlorodicyanobenzoquinone (DDQ) is an effective oxidant for the polymerization of DBSAn to yield sufficient amount of...
Synthesis of 2,3-disubstituted-2,3-dihydroquinazolin-4(1H)-one derivatives catalyzed by dodecylbenzenesulfonic acid was carried out in 80–92% yields at 40–42 °C within 1–2 h in aqueous media via one-pot three-component condensation of isatoic anhydride, aromatic aldehyde and amine under ultr...
Dodecylbenzenesulfonic acid (DBSA) doped polypyrroles (PPys) were chemically synthesized in different polymerization times and molar ratios of pyrrole (Py) to DBSA feed. The microstructures of these PPys were investigated by X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR). UV–vis ...
A facile method for synthesizing 3,4-dihydropyrimidin-2(1H)-ones and -thiones in the Biginelli reaction by condensation reaction of aldehydes, β-ketoesters and urea or thiourea with p-dodecylbenzenesulfonic acid as a recyclable catalyst under solvent-free conditions at 80 °C is described. A se...
We report herein the use of p-dodecylbenzenesulfonic acid (DBSA) as a catalyst for a one-pot Biginelli reaction to afford 3,4-dihydropyrimidinone derivatives in good to excellent yields. This reaction proceeds efficiently in water and under solvent free conditions. Comparisons of results indicat...
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