4-Fluorophenyl sulfone

Quinolyl)pyrazoIo[3,4-i7]pyridazincs were prepared by cyclocondensation reactions of an anilino-pyrazole acid with acetaldehyde <02JHC869>. Cyclopentadienyl-derived y-diketones and arylhydrazines condensed to 4-(l,4-diaryl-2//-cyclopent[d]pyridazin-2-yl)-benzenesulfonamides <02H(57)2383>. Sulfonated polyfphthalazinone ether sulfone)s 37 were prepared by polycondensation of 4-(4-hydroxyphenyl)phthalazinone 36 with various ratios of disodium 5,5 -sulfonylbis(2-fluorobenzenesulfonate) and bis(4-fluorophenyl)sulfone <02P5335>. 

Polysulfones obtained from bisphenol A and bis(4-fluorophenyl) sulfone were converted into telechelic macroinitiators by the reaction with 2-bromopropio-... 

FIGURE 5.38 Polycondensation of 4-fluorophenyl sulfone with 2,5-(4, 4"-dihydroxy biphenyl)-pyridine and tetramethyl biphenyl diol for the preparation of polyfaryi ether sulfone) copolymers containing 2,5-biphenylpyridine and tetramethyl biphenyl moieties. (After Pefkianakis, E. K., Deimede, V., Daletou, M. K., Gourtoupi, N., and Kallitsis, J. K. 2005. Macomol. Rapid Commun., 26, 1724. With permission.)... 

The copolymerization of 5-[(4-fluorophenyl)sulfonyl]-2-fiuorobenz-oic acid with bis-(4-hydroxyphenyl)-sulfone results in carboxylated PES. However, during polycondensation, partial decarboxylation occurs. The copolymerization of 2,5-dihydroxybenzoic acid with bis-(4-fluorophenyl)-sulfone results in a PES with quantitative decarboxylation. ... 

Bis (ethylphenylcarbamodithioato-S,S )-(T-4)-zinc. See Zinc ethylphenyidithiocarbamate Bis(N-ethyl-N-phenyl) urea. See N,N -Diethyl-N,N -diphenylurea Bis (ethyixanthic) disulfide Bis (ethyixanthogen) disulfide. See Diethyl xanthogen disulfide Bis (4-fluorophenyl) sulfone. See 4,4 -Difluorodiphenyl sulfone 1,4-Bis (1-formamido-2,2,2-trichloroethyl) piperazine N,N -Bis (1-formamido-2,2,2-trichloroethyl) piperazine. SeeTriforine Bis (2-furfuryl) disulfide. See Difurfuryl disulfide... 

Chlorodifluoroethane Difluorochloromethane. See Chlorodifluoromethane Difluorodibromomethane. See Dibromodifluoromethane Difluorodichloromethane. See Dichlorodifluoromethane 4,4 -Difluorodiphenyl sulfone CAS 383-29-9 EINECS/ELINCS 206-847-4 Synonyms Bis (4-fluorophenyl) sulfone 4-Fluorophenyl sulfone... 

Fluorophenyl sulfone. See 4,4 -Difluorodiphenyl sulfone Fluorophlogopite. See Fluorphlogopite Fluorosalan... 

Monomers with pendant methoxyphenyl groups can be synthesized by the bromination of bis(4-fluorophenyl)sulfone, followed by a Suzuki coupling with4-methoxybenzeneboronic acid [22], The synthesis is shown in Figure 7.4. 

Also materials based on 4-fluorophenyl sulfone, 9,9 -bis(4-hydroxyphenyl) fluorene, and 4,4 -sulfonyldiphenol, can be quaternized by a similar procedure [115]. In addition, PAES ionomers with... 

A new aromatic diamine monomer with four pendant -CF3 groups was successfully synthesized by a three-step reaction using w(4-fluorophenyl)sulfone and A-bromosuccinimide as starting materials. Then, a series of fluorinated poly(ether sulfone imide)s was conveniently prepared from the diamine and three aromatic dianhydrides (BPDA, BTDA, and ODPA) via one-step solution polycondensation. 

Phosphonate ester or phosphonic acid substituents have been additionally evaluated in an attempt to increase the interacting sites with the phosphoric acid doping agent along the polyelectrolyte macromolecular chains. These were strategically located as side groups in a diol monomer which was prepared by a phosphoms-carbon coupling reaction of tetrahydropyranyloxy diprotected 2,5-dibromo-1,4-dihydroxy benzene with diethylphosphite. Either in the phosphonate ester or in the phosphonic acid form the diol was used in polymerizations with the bis (4-fluorophenyl) sulfone or bis(4-fluorophenyl) phenylphosphinoxide as well as with the 2,5-diphenyl-pyridine diol and the tetramethyl-... 

Polymer - SOj Li + Hal - R - Hal+LiO S - Polymer -> Polymer - S(0)j - R - S(0)j - Polymer Preferred halogen alkanes were a,o)-dibromo- or a, o) -diiodoalkanes Br(I)-(CHj) -Br(I) with x = 3-12, preferred dihalogenoarylenes were bis(4-fluorophenyl)sulfone, bis(3-nitro-4-fluorophenyl)sulfone, bis(4-fluoropheny IphenyOphosphinoxide, decafluorobenzophenone, and decafluorobiphenyl. The cross-links created by S-alkylation are stable in aqueous environment, both under alkaline, neutral, and acidic conditions, and in hot dipolar-aprotic solvents such as NMP or DMAc. Moreover, the membranes showed good thermal stabihties. Two different membrane types (Fig. 8.3) have been developed ... 

Robello clearly showed that sodium 4-halobenzenesulfinate (1) can undergo CGCP and polymerized it in the presence of 4-fluorophenyl sulfone (2) as an initiator for a chain-growth polymerization (Scheme 5) [8]. 

Table 3 Stoichiometric effect on the copolymerization of bis-(4-fluorophenyl)-phosphonic acid and bis-(4-fluorophenyl)-sulfone with BPA...

Highly hindered biphenols 1 (R= CH3, Ph, Cl) were synthesized by oxidative coupling of the corresponding phenols. High molecular weight poly(aryl ether)s 3 were prepared from these biphenols by reaction with bis(4-fluorophenyl)sulfone or 4,4 -difluorobenzophenone in polar, aprotic solvents in the presence of potassium carbonate. The polymerization reactions were very slow because of the steric hindrance provided by the pendant phenyl groups in these biphenols. The polymers are amorphous and very thermooxidatively stable. They are very soluble in methylene chloride at room temperature and they can be cast into tough, flexible films. ... 

In polymerization reactions the monomer 33 behaves just like a bisphenol. The poly(ether sulfone) and poly(ether ketone) can be readily prepared by reaction with bis(4-fluorophenyl sulfone) in N,N -dimethylacetamide (DMAc) in the presence of potassium carbonate. " The polymer 34 has the structure shown with the NH group behaving just like a phenolic hydroxyl group in the polymerization reaction. 

Aromatic hb polyethers were prepared from equimolar + bs polycondensations by Kricheldorf et al. [67-69], Possum et al. [70], and Long et al. [71, 72], The Kricheldorf group studied polycondensations l,l,l-tris(4.hydroxyphenyl)ethane or its trimethylsilylderivative with 4,4 -bis(4-fluorophenyl sulfone) and with 1,4-bis(4-fluorobenzoyl)benzene [68] in moderately concentrated solutions. The MALDI-TOF mass spectra revealed a high fraction of cyclic species, and even polyethers containing two cyclic elements were detectable in the mass range above... 

Copolymer of 2,5-(di-hydroxy biphenyl)-pyridine and tetramethyl-biphenyl diol with bis(4-fluorophenyl) sulfone... 

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