Diethyl ether solvent

In our previous studies on chlorination of toluene we had found that solvent had an important effect on the selectivity. In particular, the use of diethyl ether as a cosolvent was advantageous for the production of a high proportion of the para-isomer (ref. 9). An experiment in which the amount of ether in a tetrachloromethane/diethyl ether solvent mixture was varied under otherwise identical reaction conditions (Ih reaction at 18°C with 1.04 molar equivalent of tert-butyl hypobromite) demonstrated that diethyl ether also had a marked influence on the selectivity of the bromination reaction (Fig. 6). There was also an effect on the yield of the reaction as performed under these standard conditions. As the... 

This procedure has been demonstrated to provide moderate yields and anomeric selectivity in oligosaccharide synthesis. For instance, the disaccharide 110 was obtained in 50% yield as a 1 2 a p ratio. The reaction side products were mainly the self-condensed donor (10-25%) and unreacted hemiacetal (5-10% or higher). Alternatively, the a-linked glycosides were favored with diethyl ether solvent. In this way, trisaccharide 111 was prepared from the disaccharide hemiacetal donor in 49% yield, favoring the a-anomer by 4 1. 

Other reactants can successfully be substituted without changing the procedure outlined here. For instance, Cs[B3H8] and (CO)5MnBr react in diethyl ether solvent to give a 53% yield of the desired product in 70 hours. 

Based on the method of internal normalization of peak areas, the percentage composition (less the diethyl ether solvent shown as the initial large component in Figures 1 and 2) of odor concentrates was estimated. The average composition of samples of odor isolates from individual preparations as well as from several different preparations of the same type—i.e., concurrent or noncurrent—was determined on the basis of all preparations which could be compared on a fair analytical basis (same gas chromatographic detector, column, and conditions). These results were then combined (traps plus distillate) to provide the rough estimations shown in Table IV. These data represent the best estimation of the composition of the total volatile odor concentrates from each processing method studied. 

The reaction of ferrocenecarbaldehyde (98) and resorcinol (99) under acidic conditions gave the phenolic macrocycle (100), which on addition of chlorobromomethane in the presence of a base produced the first redox-active cavitand (141,142) (101) (Scheme 31). An X-ray structural investigation on crystals of (101), obtained from a dichlorometh-ane-diethyl ether solvent mixture, revealed the inclusion of a dichloro-methane guest molecule within the cavitand host cavity (Fig. 23). Related redox-active cavitand host molecules ((102) and (103)) containing ferrocene moieties lining the wall of the cavitand cavity have also been prepared by our group (141, 142). 

Bis[carboxymethyl] Ditellurium5,6 Carboxymethyl tellurium trichloride is suspended in water, a six-fold molar excess of potassium disulfite is added, and the mixture is stirred until evolution of sulfur dioxide has ceased. The mixture is extracted with diethyl ether, solvent is removed from the extract, and the residue is recrystallized from acetone yield 100% m.p. 142° (dec.). 

Diethyl ether, solvent grade Solid C02-methylated spirit freezing bath Procedure... 

Much improved yields of ketones, formed by reaction of Grignard reagents with nitriles 33, have been obtained when reactions were performed in benzene containing 1 Eq of diethyl ether, rather than in diethyl ether alone [51]. Under the modified conditions, it is postulated that reaction occurs through a species in which the nitrile has displaced a diethyl ether solvent molecule from a dimeric Grignard species. 

PP Solvent extracts (hexane, ethyl acetate, diethyl ether) Solvent evaporation, reconstituted in chloroform/MEOH Spherisorb ODS-1, 50 X 4.6 mm, 5 pm 15-40% ethyl acetate gradient in 75 25 MEOH/water... 

Ethyl Diglyme. [Ferro/Grant] Diethylene glycol diethyl ether solvent for electrochemistiy, polymer and boron chemistry, physic processing, fuels, lubricants, textiles, pharmaceuticals, pesticides. 

Uranyl nitrate containing 1 mol of boron per 100 mol of uranium is to be purified by fractional extraction with diethyl ether from a 10 N solution of ammonium nitrate. The extract is to contain no more than 1 mol of boron per million moles of uranium and is to contain 95 percent of the uranium in the feed. What are the minimum volumes of 10 N ammonium nitrate scrub solution and diethyl ether solvent needed per unit volume of feed ... 

Yamazaki et al. resolved the Boc-protected cis racemate [78]. Treatment of the racemic c/s-2-ACPC with di-te/7-butyl dicarbonate resulted in the A-Boc-protected derivative, which was mixed with (-)-ephedrine. The resulting salt was fractionally crystallized from the ethyl acetate/diethyl ether solvent system. Treatment with sodium hydrogensulfate and removal of the Boc group with trifluoracetic acid (TFA) gave the (+)-(15,2/ ) enantiomer. 

CsMes) ] contained both fi-oxo and /t-ethoxy groups originating from cleavage of the diethyl ether solvent. 

Synonyms ether, diethyl ether solvent ether l,L-oxybis(ethane) diethyl oxide... 

Et20 (C2H5)20 Diethyl Ether. Solvent. Peroxidizes on exposure to air, dangerous. 

Hexyldecyl benzoate Jsopropyl palmitate SD alcohol 23-A solvent, dermatologicals Propylene glycol dioctanoate solvent, desulfurization Diisopropanolamine solvent, detergents Ethylene glycol diethyl ether solvent, dewaxing process Ethylene dichloride solvent, dichloramine-T Paraffin, chlorinated... 

El. You are processing halibut livers that contain approximately 25.2 wt % fish oil and 74.8 wt % insoluble solids. The following data for leaching fish oil from halibut livers using diethyl ether solvent is given by Brown and Associates ri9501 ... 

Diazo-3,3,3-trifluoropropionyl phospholipids, 440 Diazomethane, All Dibromostearic acids, 465 Dicarboxylic acids, 44, 319,463,469 Dichlorostearic acids, 465 Dielectric constant, 355,356,357 Diene synthesis, 473,476 Diepoxystearic acid, 460 Diesters, 144,154 Dietary requirements, 527 Diethyl ether, solvent for triacylglycerols, 375... 

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