摘要:
This invention relates to a process of inhibiting the polymerization of vinyl-containing materials through the use of an effective amount of a polymerization inhibitor comprising quinone diimide and a nitroxyl stable free radical under various conditions. This invention also relates to the polymerization inhibitor composition.
摘要:
A compound, of the following formula: Also disclosed is a pharmaceutical composition containing a pharmaceutically effective amount of the compound.
摘要:
The invention relates to a process for preparing N,N'-disubstituted p-quinonediimines of general formula I ##STR1## wherein a corresponding N,N'-disubstituted p-phenylenediamine is oxidized in alkaline/alcoholic solution, and also their use. The invention further provides organosilanes containing methacryloxy or acryloxy groups and having general formula II ##STR2## where R.sup.3 is a hydrogen atom or a methyl group and R.sup.4 and R.sup.5 are identical or different alkyl groups having from 1 to 4 carbon atoms and m is equal to 0 or 1 or 2, which organosilanes contain N,N'-disubstituted p-quinonediimines. Processes for preparing and stabilizing organosilanes of general formula II are described.
摘要:
This invention relates to a vinyl aromatic, especially styrene, polymerization inhibitor system comprising an N-phenyl-1,4-benzoquinoneimine compound and optionally an aryl-substituted phenylenediamine.
摘要:
Aqueous polymerization of vinyl monomer is conducted in a vessel with an internal coating. This coating is composed of the condensation reaction of an aliphatic diamine and a quinone, with the addition of a reaction stopper when reaction is 70-99% complete. Reaction stopper is an inorganic compound of sodium or sulfur.
摘要:
A p-aminophenol derivative having anti-inflammatory activity, represented by the formula ##STR1## wherein each of R.sup.1 and R.sup.2 is independently a hydrogen atom or a C.sub.1-6 acyl group; Ar is a pyrazine, pyrazine N-oxide, thiazole, benzene, pyridine, pyridazine, pyrimidine or triazine ring; R.sup.3 is a hydrogen atom, a C.sub.1-6 alkyl group, a C.sub.1-6 alkoxy-carbonyl-C.sub.1-6 alkyl group, a C.sub.1-6 alkoxy group, a halogen atom or a carboxy-C.sub.1-6 alkyl group; A is a C.sub.1-6 alkylene group; and B is a C.sub.1-6 alkyl group, or a salt thereof.
摘要:
A method is described for mass spectrometric analysis, detection and quantification of catecholamines. The methods can comprise reacting the catecholamines with a 4-aminoantipyrine reagent and detecting and/or quantifying the adduct produced by the reaction. The methods can also allow for multiplexing. Compounds formed by the reactions are also provided.
摘要:
The invention relates to the use of zwitterionic molecules for forming a hole or electron transport layer. The preferred zwitterionic molecules of the invention are derivatives of p-benzoquinonemonoimines. The invention is useful in the field of electronic devices in particular.