F Diethyl ether

Dibenzyl ether, 3655 f Dibutyl ether, 3071 f 1,1-Dichloroethylene, 0695 f 1,1-Diethoxyethane, 2545 f 1,2-Diethoxy ethane, 2546 f 3,3-Diethoxypropene, 2858 f Diethyl ether, 1697... 

Poly(dimethylketene peroxide) f Chloroethylene, 0726 f 1,3-Cyclohexadiene, 2354 f Cyclopentadiene, Oxygen, 1851 f 1,1-Dichloroethylene, 0691 f Diethyl ether, 1691... 

Among the first studies of vapour phase association by equation of state measurements was the work of Alexander and Lambertstudied the dimerization of pure acetaldehyde. They calculated. BijCphys.) from the Berthelot equation. Hydrogen bonding in mixtures of chloroform with carboxylic acids, esters, and diethylamine was investigated by Lambert et al., and Lambert also studied the chloroform -f diethyl ether system. Complex formation between acetonitrile and acetaldehyde was reported by Prausnitz and Carter. ... 

We now turn to the design of reactors for complex reactions. We will focus on the ethylation reaction, using the following less formal nomenclature A = aniline, B = ethanol, C = monoethylaniline, D = water, E = diethyl-aniline, F = diethyl ether, and G = ethylene. The four independent reactions then become... 

Ethyl bromide is a colourless liquid, of b.p. 38° and [Pg.102]

The order of halide reactivity is I > Br > Cl > F and alkyl halides are more reac tive than aryl and vinyl halides Indeed aryl and vinyl chlorides do not form Grignard reagents m diethyl ether When more vigorous reaction conditions are required tetrahy drofuran (THF) is used as the solvent... 

Isoprene reacts with a-chloroalkyl ethers in the presence of ZnCl in diethyl ether from 0—10°C. For example,a-chloromethyl methyl ether at 10°C gives a 6 1 ratio of the 1,4-adduct, (F)4-chloro-l-methoxy-2-methyl-2-butene, to the 1,2-adduct, 2-chloro-l-methoxy-2-methyl-3-butene. Other a-chloroalkyl ethers react in a similar manner to give predominately the 1,4-addition product. A wide variety of aHyUc chlorides and bromides and a-chloroethers and esters add primarily 1,4- to isoprene in the presence of acid catalysts (8). 

Butanediol (tetramethylene glycol) [110-63-4] M 90.1, f 20.4 , b 107-108 /4mm, 127 /20mm, d 1.02, n 1.4467. Distd and stored over Linde type 4A molecular sieves, or crystd twice from anhydrous diethyl ether/acetone, and redistd. Also purified by recrystn from the melt and doubly distd in vacuo in the presence of Na2S04. 

Lycoxanthin ( F, F-carotene-16-ol) [I989I-74-8J M 268.3, m 173-174°, Eicm 3360 (472.5nm), also X ax 444 and 503nm in pet ether. Crystd from diethyl ether/light petroleum, benzene/pet ether or CS2- Purified by chromatography on columns of CaC03, Ca(OH)2 or deactivated alumina, washing with benzene and eluting with 3 1 benzene/MeOH. Stored in the dark, in an inert atmosphere, at -20°. 

The fluoride [NS(0)F]3 is more stable thermally and towards nucleophilic reagents than the corresponding chloride. For example, 8.15a is hydrolyzed by water to NH(S02NH2)2, whereas sulfanuric fluoride is unaffected by cold water. In warm water, however, hydrolysis occurs to give the [N3S304F2] anion. All three fluorine atoms in [NS(0)F]3 can be replaced by primary or secondary amines at 80-90°C in the absence of a solvent. Mono- or diphenyl derivatives can be prepared by treatment of [NS(0)F]3 with PhLi in diethyl ether at -70°C, while the Friedel-Crafts reaction with benzene at reflux in the presence of AICI3 gives two isomers of [NS(0)Ph]3. ... 

The aqueous acid solution is rendered alkaline by adding 2 N sodium hydroxide solution. After extracting with diethyl ether (3 times 100 cc), drying the extracts over potassium carbonate, treating them with decolorizing charcoal, filtering and evaporating the ether, a yellowish oil (0.9 g), identified as 5-methyl-10-methylamino-10,11 -dihydro-dibenzo[b,f] azepine, is obtained in a yield of 37.5%. 

Evidence for the formation of didehydroazepine 25 by an elimination-addition process has been obtained by treating Ar,Ar-diethyl-5-fluoro-3//-azepin-2-amine (24, X = F) with tm-butyl-lithium in diethyl ether at — 20 C and quenching the mixture with methanol, whereupon a 2.5-3 1 mixture of the 4-tert-butyl- 26 and the 5-tert-butyl-3//-azepine 27 is obtained in 80-90% yield.206 5-Chloro-V,A-diethyl-3//-azepin-2-amine furnishes the same products in a similar ratio. 

As well as the disubstituted C2-symmelrie pyrrolidines E and F, the monosubstituted (f> )-2-(mcthoxymethyl)pyrrolidine G can be used as chiral auxiliary for the diastereoselecti ve addition of organomctallic reagents to a-oxo amides16. As with the phenylglyoxylic acid derivatives derived from amines E and F. methyllithium or methylmagnesium bromide in diethyl ether preferentially attack the (,S)-mms-conformer 11 (R = ( 6H5), leading to predominant formation of the (2 S)-diastercomer by Re-side attack. 

An interesting and stereoselective synthesis of 1,3-diols has been developed which is based on Lewis acid promoted reactions of /f-(2-propenylsilyloxy (aldehydes. Using titanium(IV) chloride intramolecular allyl transfer takes place to give predominantly Ag/r-l,3-diols, whereas anti-1,3-diols, formed via an / / /-molecular process, are obtained using tin(IV) chloride or boron trifluoride diethyl ether complex71. 

To a stirred solution of 0.74 g (4 mmol) of (S)-2,5-dihydro-2-isopropyl-3,6-dimethoxypyrazine in 20 mL of THF under a nitrogen atmosphere are added at — 70 °C, 2.6 mL (4 mmol, 1.55 N in hexane) of butyllithium and stirring is continued for 10 min. Then, a solution of 0.97 g (6 mmol) of methyl (/f)-3-phenylpropenoate in 10 mL of THF is added. After 2 3 h a solution of 0.24 g (4 mmol) of acetic acid in 2 mL of THF is added and the mixture is allowed to warm to 25 rC. The solvent is removed in vacuo, the residual product dissolved in 10 mL of diethyl ether, then shaken with 10 mL of water, and the water layer extracted twice with 10 mL of diethyl ether. The combined diethyl ether extracts are dried over MgS04 and the diethyl ether is evaporated. The crude product is purified by bulb-to-bulb distillation to give the adduct yield 1.28 g (92%). 

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