Sulfonamide's structure consists of two imperative functional groups, amide moiety (N1) and a basic amine functionality (N4). Although it is presumed that weakly basic aniline component can impart basic character to sulfonamides, practically these are weakly acidic in nature. It is the sulfamoyl ...
Either aprotic, amphiprotic, basic, or acidic developing mixtures can be used for separations. The retention data can be correlated, in general, to the p K a values for the weak bases and to column and batch retention data obtained with strongly acidic cation resin....
(POI) in cells. In a second step, the reactive handle chemoselectively reacts with a designed synthetic probe.bSchematic illustration of the basic principle of ligand-directedN-acyl-N-alkyl sulfonamide (LDNASA) chemistry. The reagent binds to a POI through a specific protein–ligand interaction...
Sulfamides and trifluoromethylsulfonamides lacking acidic protons and weak C–H bonds stood out as promising starting points; notably, the exceptional stability of the TFSI anionic component of the commonly used LiTFSI salt provided further motivation for exploring these scaffolds. BTMSA, BMCF3SA, ...
The presence of undesired vegetation causes substantial damage to useful crops, especially agricultural products that satisfy man's basic food and fiber needs such as soybeans, barley wheat and the like. The current population explosion and concomitant world food shortage demand improvements in the eff...
Examples of pharmaceutically acceptable salts include, but are not limited to, mineral or organic acid salts of basic residues such as amines; alkali or organic salts of acidic residues, such as carboxylic acids; and the like. The pharmaceutically acceptable salts include the conventional non-toxic...
Although ion exchange resin and chelate resin are one of the most widely used materials for desalination, they have a drawback in regeneration, in which huge amount of salt or strong acidic/basic aqueous solution needs to be applied. In this research, sulfonamide-derived cation capturing system ...
Synthetic ion-exchange material is made in the form of sheets, films, rods, cylinders or tubes, characterized by the presence of positive and negative groups on common macromolecules and a combined acidic and alkaline capacity of at least 0.3 meq. per gram. The macromolecular material which ...
Primary sulfonamide polymers (polymer-SO2—NH-polymer) have an acidic proton on a sulfonamide nitrogen. When exposed to sufficiently basic solutions this proton is removed and the sulfonamide group becomes negatively charged (as shown in the following scheme). ...
The substituents on Q are chosen to render the hydrogen to which Q is attached acidic. In one subgenus, Q is —N[PO(O-alkyl)2]. In another subgenus, Q is —N(COR1)—. In a third subgenus, Q is —N( SO2R1). R1 is chosen from aryl, substituted aryl, heteroaryl, substituted ...