Tris 2,4-dihydroxyphenyl

Refluxing a mixture of tellurium tetrachloride and 1,3-dihydroxybenzene under an atmosphere of nitrogen produced tris[2,-4-dihydroxyphenyl] telluronium chloride (m.p. 129-131°) in 33% yield1. 

Tris(4-diethylaminophenylazo) triphenylamine, see P-00003 Tris(2,4-dihydroxyphenyl)methane, T-00388 Tris(2.4-dimethoxyphenyl)carbinol, see H-00056... 

Thymolbenzein, T-00180 Thymol blue, T-00181 Thymolphthalein, T-00182 Thymolphthalexon, T-00183 Thymoltetrachlorophthalein, T-00184 2, 4, 5 -Trichlorofluorescein, T-00224 2, 4, 7 -Trichlorofluorescein, T-00225 Tris(4-aminophenyl)methanol, T-00383 Tris(2,4-dihydroxyphenyl)methane, T-00388... 

In order to check for the possibility of primary electron transfer, hydroperoxides were allowed to react with the donors that contained the stabilizing groups, namely, 4,4 -di(ani-syl) sulfide or l,2-dihydroxyphenyl-bis 2,4,6-tri(/m-butyl)phenyl phosphite. The ESR method revealed the formation of corresponding cation radicals. 

Consequently, tubuloside D (21) was determined to be 2-(3,4-dihydroxyphenyl) ethyl 2 3,4-tri-O-acetyl-a-L-rhamnopyranosyl (1—3)-0- /W>glucopyranosyl(l— 6)]-(4-0-p-coumaroyl)-2-0-acetyl-/ -D-glucopyranoside. 

The high-spin Fe" -enterobactin complex is exceptionally stable thermodynamically having the largest formation constant (ca. 10 ) known for any Fe" complex. A number of synthetic analogues for enterobactin which contain 1,2-dihydroxyphenyl chelating groups have been investigated. One of these, hexadentate l,3,5-tris 2,3-dihydroxybenzoylaminomethyl)benzene (27) has been shown to form a 1 1 [FeL] complex with a formation constant of 10 . ... 

Another highly selective polyaddition is based on the reaction between phenols and oxazolines, which was applied for the synthesis of hb poly(etheramide)s (3-10). The AB2-monomer 2-(3,5-dihydroxyphenyl)-l,3-oxazoline was polymerized thermally at 190 °C in N-methylcaprolactam solution and randomly branched products with a DB of 50% were obtained.Kakodawa et al. used monomer 3-14, namely 2,2-bis(hydroxymethyl) propyl acrylate, for the synthesis of poly(ether ester)s via triphenylphosphine catalysis. The polymers had only low molecular weight, but as they contain phosphonium ions they can be applied in flame-retardant coatings, which can be cured by UV. These materials can also be synthesized via an A2+Bs-approach [vide infra) of tri(acryloy-loxyethyl) phosphate in the presence of piperidine." ... 

Preparation by Hoesch condensations of 1,2,4-tri-hydroxybenzene with 2,4-dimethoxyphenyl-acetoni-trile or with 2,4-dihydroxyphenyl-acetonitrile, followed by partial met-hylations of the ketones so obtained [5265]. 

Obtained by reaction of 2,4-dihydroxyphenyl 2,4,5-tri-methoxybenzyl ketone with benzyl chloride in the presence of potassium carbonate in refluxing acetone for 8 h (94%) [5560]. 

Potassium hexachloroiridate(IV) and potassium hexacyanoferrate(III) were obtained commercially and used directly. Tris-(2,2-bipyridyl)iron(II) perchlorate was synthesized according to Reference 13. Catechol(1,2-di-hydroxygenzene), L dopa(3- 3,4-dihydroxyphenyl)alanine), and tiron(l,2-dihydroxybenzene-3,5 disulphonic acid) were obtained commercially. 

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