of six cationic surfactants is branched (tetrabutylammonium bromide (C4)4ABr) and the others are linear (with five different hydrocarbon chain lengths, i.e. C16TABr, C14TABr, C12TABr, C10TABr, and C8TABr).The organoclays were characterized by spectroscopic techniques such as XRD and FT-IR...
A model·compound 18 for 23 also showed the bands due to the acetal ring at I090 and 835 cm - 1 in the IR spectrum re- sembling that of 23. With Amines. Amination and quaternization reactions of the bromide. of poly(3a) were examined with aromtic and aliphatic amines. The reaction...
Substrate scope.aScope of alkynes.bScope of cesium oxalates.cScope of aryl halides. Reaction conditions: Ir-1(3 mol%), NiCl2•glyme (20 mol%), dtbbpy (20 mol%), alkyne (0.1 mmol), oxalate (1.5 equiv.), bromide (2.0 equiv.), DMSO [0.05 M], 90 W blue LED, 36...
The 13C NMR spectrum of compound 4a showed eight distinct resonances in agreement with the proposed structure. The structural assignments made on the basis of the NMR spectra of compound 4a were supported by its IR spectrum, the amid carbonyl groups exhibited strong absorption bands at 1734 cm-...
The system was flushed with N2 and benzyl bromide (2.8 mL, 23.47 mmol) was added dropwise while stirring. The reaction mixture was stirred under N2 for 16 h.43 The reaction was quenched using water (40 mL) and extracted with DCM (3 × 40 mL). The organic layer was washed with water...
(WHO)’s list of priority pathogens under the “critical priority” category. The fact that only one broad-spectrum agent, cefidorocol, is currently available to treat infections caused by all three bacteria highlights the urgent need for new therapeutic options, preferably with novel mechanisms ...
The in vitro microbiological activity of the synthesized phosphonium bromides against gram-positive, gram-negative bacteria and the yeast Candida albicans was determined in comparison to standard agents. Microbiological results indicate the synthesized phosphonium salts possess a broad spectrum of activity ...
IR Spectrum (chloroform): Presence of NH2at 3378cm-1, NH and aromatic. STEP G: N-[β-(4'-(2"-methyl-6"-methoxy-3"-indolyl)-piperidino)-ethyl]-p-fluor obenzamide Using the procedure of Step C of Example 1, 6.85 g of the product of Step B, 2.43 g of sodium carbonate and 5.5...
An IR spectrum showed a nitrile band at 2265 cm-1 and an NMR spectrum showed a ratio of approximately 70/30 of product 1/furoic acid. The crude product 1 was used without further purification (49% yield of product). Furyl-2-glyoxylic Acid 2 The 51 g. of crude 2-furoyl cyanide 1...
FIG. 4 shows IR spectrum of the silazane compound obtained in Example 2. DESCRIPTION OF THE PREFERRED EMBODIMENTS The silazane compound having two fluoroalkyl groups according to the present invention is represented by the following general formula (1): wherein Rf and Rf′ are each a fluoroalk...