摘要:
A compound represented by the formula (I): (R1)m-AnullXY-Bnull(R2)nnullnull(I) or a salt or a solvate thereof; and a composition and a kit both containing any of these. In said formula I, X represents CH, Sulfur, or nitrogen; Y represents CH, sulfur or nitrogen, or absent; means a single bond or a double bond; A and B each independently represents a benzene ring or six-membered heterocyclic containing one or two atoms of nitrogen, oxygen, or sulfur; and R1 and R2 represent one to seven substituents of ring A and ring B, respectively.
摘要:
A hydroxydiphenylamine compound can be converted to an N-phenylquinoneimine by reacting the hydroxydiphenylamine with oxygen or an oxygen containing gas in the presence of a modified activated carbon catalyst, the catalyst having had surface oxides removed therefrom.
摘要:
Novel Schiff base quinone complexes are provided. They are useful as anti-fading agents and filter dyes. The anti-fading agents are applicable to heat developable photosensitive materials, silver halide photosensitive materials, and optical recording materials.
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.