Triethyleneglycol

It has been shown (87KGS787) that the dehydrobromination of (2-bromopropen-3-yl)pyrazole 23 by KOH in triethyleneglycol (150°C, 0.5 h) gives the intermediate allene which is transformed into 3,5-dimethyl-l-phenyl-4-prop-l-ynyl-l/7-pyrazole (24) (Scheme 33). 

Barsky also used as a plasticizer, a compn prepd by heating a mixt of pelargonic acid 80, caprylic acid 15, and heptoic acid 5%, with a mixt of diethyleneglycol and triethyleneglycol in equal proportions... 

More recently, the same type of hgand was used to form chiral iridium complexes, which were used as catalysts in the hydrogenation of ketones. The inclusion of hydrophihc substituents in the aromatic rings of the diphenylethylenediamine (Fig. 23) allowed the use of the corresponding complexes in water or water/alcohol solutions [72]. This method was optimized in order to recover and reuse the aqueous solution of the catalyst after product extraction with pentane. The combination of chiral 1,2-bis(p-methoxyphenyl)-N,M -dimethylethylenediamine and triethyleneglycol monomethyl ether in methanol/water was shown to be the best method, with up to six runs with total acetophenone conversion and 65-68% ee. Only in the seventh run did the yield and the enantioselectivity decrease slightly. 

In a recent study, poly(aryl ether) dendritic branches terminated with triethyleneglycol chains were attached to Cgg [66] dendrimer 32 represents the fourth generation. The photophysical properties of these fullerodendrimers have been systematically investigated in three solvents, namely toluene, dichloromethane, and acetonitrile. On increasing dendrimer generation, it has been found that in each solvent (i) the maximum of the fullerene fluorescence band is red-shifted... 

Butoxyethanol Dimethoxyethane Diethyleneglycol Dihydropyran 2-Methoxyethanol Di butyl ether 01 pentyl ether Triethyleneglycol... 

Polymer Synthesis. A solution of 30 mL of (meth)acrylic acid, 5 mol% triethyleneglycol di(meth)acrylate and 0.3 g K2S20g in 300 mL deionized water was stirred and heated at 95°C under N2 for two hours. The gelatinous mass was vacuum dried at 50°C for 48 hours. The polymer was then ground in a Micro-Mill. The portion passing through a 40 mesh screen (<425m) was extracted three times with 80-90°C water and then redried. 

First, oligo(ethylene oxide) monomethylether was treated with excess BH3-THF complex in THF. After solvent and borane-THF were removed under reduced pressure, the resulting hydroborane with an oligo(ethylene oxide) tail was polymerized with triethyleneglycol in THF at room temperature (r.t.). The polymers obtained were purified by reprecipitation into //-hexane or by washing with diethylether to give colorless or translucent gums in 61—76% yield. 

Fig. 14 Water-soluble CCVJ, hydrophobic CCVJ farnesyl ester (FCVJ) for cell membrane applications [88], and hydrophilic CCVJ triethyleneglycol ester (CCVJ-TEG) [89]...

Most of the molecules introduced in this chapter are hydrophobic. Even those molecules that have been functionalized to improve water-solubility (for example, CCVJ and CCVJ triethyleneglycol ester 43, Fig. 14) contain large hydrophobic structures. In aqueous solutions that contain proteins or other macromolecules with hydrophobic regions, molecular rotors are attracted to these pockets and bind to the proteins. Noncovalent attraction to hydrophobic pockets is associated with restricted intramolecular rotation and consequently increased quantum yield. In this respect, molecular rotors are superior protein probes, because they do not only indicate the presence of proteins (similar to antibody-conjugated fluorescent markers), but they also report a constricted environment and can therefore be used to probe protein structure and assembly. 

PM 94400 36443-68-2 Irganox 245 Triethyleneglycol bis[3-(3-tert-butyl-4-hydroxy-5methylphenyl) propionate] 586.37 4 585.3 367.2, 409.2... 

Materials. The radical-type photopolymerizable formulation consisted of a mixture of hexanediol diacrylate (HDDA from UCB) and a polyurethane-diacrylate (Actilane 20 from Arkros). A bis-acylphosphine oxide (BAPO from Ciba) was used as photoinitiator at a typical concentration of 1 wt %. The cationic type photopolymerizable resin consisted of a mixture of the divinylether of triethyleneglycol (RapiCure DVE-3 from ISP) and a divinylether derivative of bis-phenol A (DVE-BPA). The cationic photoinitiator (Cyracure UVI-6990 from Union Carbide) had a composition of 50 wt % of mixed triarylsulfonium hexafluorophosphate salts and 50 wt % of propylene carbonate. The BAPO initiator... 

Table 2 Influence of the temperature on the cationic photopolymerization of the divinyl ether of triethyleneglycol (DVE-3) (1 = 5 mW cm-2). Film laminated between 2 KBr crystals ...

Quasi-nematic or compensated cholesteric phases were formed by CTC dissolved in mixtures of methylpropyl ketone (MPK) and DEME. CTC/MPK has a right-handed twist but CTC/DEME a left-handed one (109). Siekmeyer et al. (IIQ) studied the phase behavior of the ternary lyotropic system CTC/3-chlorophenylurethane/triethyleneglycol monoethyl ether. 

Nitrate esters are characterized by -O-NO2 bonds in their structures. Typical nitrate esters used in propellants and explosives are nitrocellulose (NC), nitroglyc-erin(NG), triethyleneglycol dinitrate (TEGDN), trimethylolethane trinitrate (TMETN), diethyleneglycol dinitrate (DEGDN), and nitratomethyl methyl oxetane (NIMO). These nitrate esters are aU liquid at room temperature, with the excephon... 

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