Glycol dibromide

Chemical DesignationsBromofiime 1,2-Dibromoethane sym-Dibromoethane Dowfume 40, W-10,W-15, W-40 Ethylene bromide Glycol dibromide Chemical Formula BrCHjCH Br. Observable Characteristics - Physical State (as normally shipped) Liquid Color Colorless Odor Mildly sweet like chloroform. [Pg.166]

Mandolini and Masci provided further information on this question quite recently by demonstrating that polyethylene glycol dibromides undergo partial hydrolysis and then cyclization in water containing Ba ions. According to the report, yields were higher in this reaction when barium cation was present than when it was absent. [Pg.16]

The most demanding test of cesium carbonate as base was with 2,3-dihydroxypyridine (3-hydroxypyridone). The cesium salt was found to be fairly unstable, apparently oxidizing quite rapidly. Model reactions suggested that alkylation would occur 1,3 (N, 0) to give the substituted pyridone. Nevertheless, on the basis of UV and H-nmr analysis, the product of reaction between 2,3-dihydroxypyridine and tetraethylene glycol dibromide was assigned as the pyridocrown (23% yield, mp 77—78.5°) as shown in Eq. (3.60). [Pg.54]

Ethyl sec-amyl ketone, see 5-Methyl-3-heptanone Ethylbenzol, see Ethylbenzene Ethyl butyl ketone, see 3-Heptanone Ethyl n-butyl ketone, see 3-Heptanone Ethyl carbinol, see 1-Propanol Ethyl cellosolve, see 2-Ethoxyethanol Ethyl chloride, see Chloroethane Ethylcyclopentan, see Ethylcyclopentane Ethyldimethylmethane, see 2-Methylbutane Ethylendiamine, see Ethylenediamine Ethylene aldehyde, see Acrolein Ethylene bromide, see Ethylene dibromide Ethylene bromide glycol dibromide, see Ethylene dibromide... [Pg.1486]

ETHYLENE DIBROMIDE 1,2-Dibromoethane, Glycol Dibromide, Bromofume, Ethylene Bromide ORM-A, 11 3 0 0... [Pg.101]

Synthesis from polyethylene glycol dibromides. Treatment of a poly (ethylene glycol) dibromide with Ba(OH)2 8H2O as a source of OH" and Ba followed by pyrolysis results in a crown ether. The Ba ion acts as a template. The present method requires only one building block (with one less oxygen than the crown ether formed). Highest yields (50%) are obtained with 18-crown-6. ... [Pg.68]

EDB-85 E-D-BEE ENT 15,349 ETHYLENE BROMIDE FUMO-GAS GLYCOL BROMIDE GLYCOL DIBROMIDE ISCOBROME D KOPFUME... [Pg.624]

SYNONYMS Alpha,beta-dibromoethane, a,a-dibroom, 1,2-dibromoethane, glycol-dibromide, nephis, postmaster, soilflime, sym-dibromoethane. [Pg.103]

SYNONYMS 1,2-dibromoethane, ethylene bromide, glycol dibromide. [Pg.625]

Synonyms/Trade Names 1,2-Dibromoethane Ethylene bromide Glycol dibromide... [Pg.136]

Glycol dibromide. See Ethylene dibromide Glycol dichloride. See Ethylene dichloride Glycol diformate. See Ethylene glycol diformate Glycol dilaurate... [Pg.1934]

Ethylene bromide glycol dibromide, see Ethylene dibromide Ethylene dibromide... [Pg.612]

A new, convenient, one-precursor crown synthesis proceeds from polyethylene glycol dibromides in the presence of barium hydroxide [equation (23)] half... [Pg.168]

Some thia-crown ethers have been prepared from the reaction between caesium thiolates of appropriate l,w-dithiols and polyethylene glycol dibromides.The synthesis of mono-aza-crown ethers from dialkanolamines [equation (17)] can be performed without the need for a protecting group on... [Pg.190]

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