1-Arylthio-3,5-dinitrobenzenes are selectively oxidized to the corresponding sulfones and sulfoxides by the action of hydrogen peroxide. Reactions of 3,5-dinitrodiphenyl sulfone with O- and S-centered nucleophiles (RXH, X = O, S) in dipolar aprotic solvents in the presence of K2CO3 result in replacement of the nitro group by the RX fragment; the reaction with methanol occurs in aqueous medium in the presence of NaHCO3. Substitution of the nitro group in 3,5-dinitrodiphenyl sulfone by phenylthio group, followed by oxidation of the sulfur atom to SO, and further replacement of the remaining nitro group yields 1,3,5-tris-(phenylsulfonyl)benzene. The phenylsulfonyl group in the latter is replaced by phenylthio group by reaction with PhSH in the presence of K2CO3. Mononitrosulfones obtained by nucleophilic substitution in the title compound can be reduced to the corresponding anilines.
NOVEL FLUORINE-CONTAINING DICARBOXYLIC ACIDS AND THEIR NOVEL POLYMER COMPOUNDS
申请人:Narizuka Satoru
公开号:US20090030173A1
公开(公告)日:2009-01-29
Disclosed is a fluorine-containing dicarboxylic acid represented by formula (1),
wherein n represents an integer of 1-4, and the two carboxylic groups are not adjacent to each other on the aromatic ring. It is possible to obtain a linear polymer compound by reacting the fluorine-containing dicarboxylic acid with a comonomer (e.g., diaminodiol). By thermal cyclization, this linear polymer compound can be converted into another polymer compound having superior characteristics.
Fluorine-Containing Dicarboxylic Acids and Their Novel Polymer Compounds
申请人:NARIZUKA Satoru
公开号:US20110282026A1
公开(公告)日:2011-11-17
A fluorine-containing dicarboxylic acid represented by formula (1),
wherein n represents an integer of 1-4, and the two carboxylic groups are not adjacent to each other on the aromatic ring. It is possible to obtain a linear polymer compound by reacting the fluorine-containing dicarboxylic acid with a comonomer (e.g., diaminodiol). By thermal cyclization, this linear polymer compound can be converted into another polymer compound having superior characteristics.