Diethylene derivative

The residue in the flask is either a solution or a suspension of the potassium salt of the acid derived from the ester in diethylene glycol. Add 10 ml. of water and 10 ml. of ethyl alcohol to the residue and shake until thoroughly mixed. Then add a drop or two of phenolphthalein and dilute sulphuric acid, dropwise, until just acid. Allow the mixture to stand for about 5 minutes and then Alter the potassium sulphate. Use the clear filtrate for the preparation of a sohd derivative or two of the acid (see Section 111,85,4). 

Monoethylene glycol derivatives ate termed "ceUosolves" diethylene glycol derivatives, "carbitols" and triethylene glycol derivatives, triglycols. CELLOSOLVE and CARBITOL ate registered trademarks of EFnion Carbide Corp. 

Ahyl alcohol undergoes reactions typical of saturated, aUphatic alcohols. Ahyl compounds derived from ahyl alcohol and used industriahy, are widely manufactured by these reactions. For example, reactions of ahyl alcohol with acid anhydrides, esters, and acid chlorides yield ahyl esters, such as diahyl phthalates and ahyl methacrylate reaction with chloroformate yields carbonates, such as diethylene glycol bis(ahyl carbonate) addition of ahyl alcohol to epoxy groups yields products used to produce ahyl glycidyl ether (33,34). 

A number of useful resins have been prepared from allyl compounds, i.e. derivatives of allyl alcohol CH2 = CH CH20H. One of these, diethylene glycol... 

Pyrimidines have also served as electrophiles in crown synthesis from this group. 4,6-Dichloropyrimidine reacts with diethylene glycol and sodium hydride in anhydrous xylene solution to form the 20-crown-6 derivative as well as the other products shown in Eq. (3.48). Note that a closely related displacement on sy/rr-trichlorotriazine has been reported by Montanari in the formation of polypode molecules (see Eq. 7.5). 

Coxon and Stoddart have directed their attention to the formation of penta-erythritol-derived cryptands. With these molecules, the strategy was to block one pair of hydroxyl groups as an acetal and form a crown from the remaining diol. In the first of the two reports cited above, this was accomplished by treating the 0-benzylidine derivative of pentaerythritol with base and diethylene glycol ditosylate. The crown was then treated with a mixture of UAIH4 and BF3 which gives partial reduction of the acetal as shown in (8.9), above. The monoprotected diol could now be treated in a fashion similar to that previously described and the benzyloxy cryptand (77) would result. The scheme is illustrated below as Eq. (8.10). 

Ethynylation of 3j -hydroxy-16a-methyl-5a-androstan-17-one in a mixture of diethylene glycol dimethyl ether and diethylene glycol monoethyl ether in the presence of potassium hydroxide produces two isomeric 17-ethynyl derivatives. This result is not unexpected since molecular models suggest that the steric influence of the 13/ -methyl group is nearly offset by the 16a-methyl group. The presence of a 16a-acetoxy group in the estrone series also leads to the formation of epimeric 17-ethynyl compounds (61) and (62) on reaction with acetylenedimagnesium bromide. 

Application of the reaction to the 2-azidobenzoyl derivative of diethylene glycol monomethyl ether 92, in a mixture of tetrahydrofuran and diethylene glycol monomethyl ether as the nucleophile, affords 2-(2-methoxyethoxy)ethyl 2-[2-(2-methoxyethoxy)ethoxy]-37/-azepine-3-carbo-xylate (93), which displays metal cation complexing properties towards lithium, potassium, and. to a lesser extent, barium and calcium cations.198... 

Piperazine and Derivatives. See Diethylene-diamine and Derivatives in Vol 5, D1230-R to D1231-R. An addnl ref is A.T. Blomquist, OSRD 4134 (1944), 7 68... 

The principal solvolysis reactions for PET are methanolysis with dimethyl terephthalate and ethylene glycol as products, glycolysis with a mixture of polyols and BHET as products, and hydrolysis to form terephthalic acid and ethylene glycol. The preferred route is methanolysis because the DMT is easily purified by distillation for subsequent repolymerization. However, because PET bottles are copolyesters, the products of the methanolysis of postconsumer PET are often a mixture of glycols, alcohols, and phthalate derivatives. The separation and purification of the various products make methanolysis a cosdy process. In addition to the major product DMT, methanol, ethylene glycol, diethylene glycol, and 1,4-cyclohexane dimethanol have to be recovered to make the process economical.1... 

Diethylalkylacetamide derivatives 45 Diethylamine vapor reagent 86 Diethylene glycol 426 Diethylstilbestrol 80,84,105,413,414,432,... 

Figure 13 shows a full NMR spectrum of PET, in TCE solvent, acquired at 100°C. Resonances a and b are from the terephthalate and ethylene glycol derived protons, respectively. Resonances c and d arise from the protons in diethylene glycol (DEG), which is formed as a side reaction in the PET polymerisation process. An expansion of the ethylene glycol-based region of the spectrum is shown in Figure 14. Proton NMR techniques have been described for characterising end groups [42-44], the methodology below being that which is used in our laboratory.

Recently, the potential of 157Gd, which has a much higher cross sectional value than 10B for thermal neutrons has been of interest. Chelating agents, diethylene-triaminepentaacetic acid (DTPA) derivatives bearing carborane, were synthesized by the reaction of carboranyl allyl carbonate with DTPA ester. Treatment of... 

One type of cationic surfactant was the fatty acid derivatives of polyamines. The properties of the derivatives of fatty acids and ethylenediamine have been described in the literature (7-9). It appeared from these reports that the 2-alkyl-2-imidazolines would not impart sufficient hydrophobicity to soils. However, the analogous series of homologous compounds from the fatty acids and diethylene-triamine (BETA) appeared likely to do so because of their higher molecular weight. 

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