Oligoethylene glycol

In this method, an oligoethylene glycol is treated with 0.3 eq. of sodium bromoace-tate in methanol. The resulting monocarboxylic acid salt is then treated with toluene-sulfonyl chloride, sodium carbonate and dioxane. After heating the reaction mixture at 50° for an hour, the product was obtained either by Kugelrohr distillation or extraction. The two compounds produced in the reaction below (i.e., n = 1 and n = 2) were formed in 38% and 42% yields respectively . 

All known methods of initiation are used for inducing three-dimensional polymerization of AAm, AAc, and their copolymerization [37, 38]. Some special initiating systems have been also elaborated [39]. There is a wide choice of crosslinking agents various A,A -bis-acrylamides (methylene, ethylene, isopro-pylidene) as well as dimethacrylates of oligoethylene glycols and some others. 

Jandera, P., Urbanek, J. (1995). Comparison of chromatographic behavior of oligoethylene glycol nonylphenyl ether non-ionic and anionic surfactants in reversed-phase high-performance liquid chromatography. J. Chromatogr. A 689(2), 255-267. 

An interesting application of carbenoid O/H insertion is the synthesis of macrocyclic oxacrown ethers 337 from a,a>-diazoketones 336 and oligoethylene glycols 323). 

Bridged polysilsesquioxanes having covalently bound acidic groups, introduced via modification of the disulfide linkages within the network, were studied as solid-state electrolytes for proton-exchange fuel cell applications.473 Also, short-chain polysiloxanes with oligoethylene glycol side chains, doped with lithium salts, were studied as polymer electrolytes for lithium batteries. 

Is the phase transfer catalytic ability of these materials independent of molecular weight as the cation binding is The answer to this question was determined kinetically (27). The rate of the simple, Sjj2 reaction shown below was monitored in the presence of different catalysts and different amounts of oligoethylene glycols. 

Oligoethylene glycols are relatively weak cation binders but they are... 

Okahara and coworkers have developed a one-step cyclization of oligoethylene glycol ( 1, 19) and applied it to the convenient synthesis of crown ethers with higher alkyl chains (, 21). 

Hydroxycrotyl-oligoethylene glycol-n-alkanoyl High Throughput Screening... 

TentaGelS-NH2 was chosen as the polymeric support, i.e. a polystyrene resin equipped with terminally NH2-functionalized oligoethylene glycol units. It has a polar surface and swells in aqueous solutions allowing the biocatalyst access to the polymer matrix [53]. 

Various alkyl-substituted crown ethers have been prepared by cyclic addition across a double bond (e.g. bromination (77S854) or oxymercuration (80CC925)). Similarly, displacement of oligoethylene glycol dichlorides by cyanamide yields V-cyano monoaza crown ethers (81TL4105). 

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