A method is described for autoxidizing a novel class of bis(ortho dialkyl-phenoxy)benzophenones directly to their corresponding dianhydrides. The method comprises autoxidizing the benzophenones in a solution of an aliphatic monocarboxylic acid having 3 to 8 carbon atoms with oxygen in the presence ...
(6FDAM) was synthesized in a simple procedure, which was then employed to prepare a series of fluorinated polyimides with commercial aromatic dianhydrides, such as pyromellitic dianhydride (PMDA), 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane (6FDA), 3,3′,4,4′-benzophenonetetracarboxylic ...
2,2',3,3'-benzophenone tetracarboxylic acid dianhydride; 2,3,3',4'-benzophenone tetracarboxylic acid dianhydride; 4,4'-bis(3,4-dicarboxyphenoxy) benzophenone dianhydride; bis(2,3-dicarboxyphenyl)methane dianhydride; bis(3,4-dicarboxyphenyl)methane dianhydride; ...
phenoxy (where the substituents on phenyl or phenoxy are pref. halogen, lower alkyl, lower alkoxy, nitro, amino or cyano); R5 and R6 are H or amino-protective groups, pref. acetyl, tert-butoxycarbonyl or benzyloxycarbonyl; R7 is lower alkyl, or benzyl (opt. substd. by halogen, lower ...
2,3,4,5,6-Pentafluorophenoxyacetylchloride,99%2,3,4,5,6-五氟苯氧基乙酰基氯,99% 2,3,4,5,6-Pentafluorophenylaceticacid,98+%2,3,4,5,6-五氟苯基乙酸,98+% 2,3,4,5,6-Pentafluorophenylaceticacid,98+%2,3,4,5,6-五氟苯基乙酸,98+% 2,3,4,5,6-Pentafluorophenylacetonitrile,98%2,3...
·H2O (8) (m-H2bdc = 1,3-benzenedicarboxylic acid, NH2–H2bdc = 5-NH2–1,3-benzenedicarboxylic acid, p-H2bdc = 1,4-benzenedicarboxylic acid, H3btc = 1,3,5-benzenetricarboxylic acid, o-H2bdc = 1,2-benzenedicarboxylic acid, btda = 3,3′,4,4′-benzophenonetetracarboxylic dianhydride ...
2,2-Bis{4-[4-(4-aminophenyldiazenyl)phenoxy]phenyl}propane (10a; 7; 0.3184 g, 0.5246 mmol) and DMAc (4 mL) were added to a 25 mL 3-necked flask equipped with a magnetic stirrer, nitrogen inlet and outlet, and stirred under dry nitrogen at room temperature for 30 min. PMDA (8a; ...
SYNTHESIS AND CHARACTERIZATION OF ORGANO-SOLUBLE FLUORINATED POLYIMIDES FROM 4,4'-BIS(3-AMINO-5-TRIFLUOROMETHYLPHENOXY)-BIPHENYL AND VARIOUS AROMATIC DIANH... chloroform andcyclopentanone.PI-4,derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride and TFBPDA,was even soluble intoluene.Moreover...
4.6 g (0.025 mol) of N-methyldiphenylamine are slowly added dropwise at room temperature to a suspension of 11.3 g (0.05 mol) of 4-dimethylaminobenzophenone and 10.7 g (0.075 mol) of phosphorus pentoxide in 38.5 g (0.25 mol) of phosphorus oxychloride. The mixture is heated to 90° C. ...
New chemicals containing two diphenylaminomethane groups, linked together by a moiety other than oxygen, e.g., 1,2-bis[4-(3-methyl-alpha-aminobenzyl)phenoxy]ethane, are effective antimicrobial agents