Ethylene dibenzoyl

Dimethyl peroxide Diethyl peroxide Di-t-butyl-di-peroxyphthalate Difuroyl peroxide Dibenzoyl peroxide Dimeric ethylidene peroxide Dimeric acetone peroxide Dimeric cyclohexanone peroxide Diozonide of phorone Dimethyl ketone peroxide Ethyl hydroperoxide Ethylene ozonide Hydroxymethyl methyl peroxide Hydroxymethyl hydroperoxide... 

Cross-linking with peroxides has been known since 1915 when Ostromyslenski [46] disclosed that NR could be transformed into a cross-linked state with dibenzoyl peroxide. However, little interest in peroxide cross-linking evolved until the development of fully saturated ethylene-propylene copolymers in the early 1970s. 

Dimethyl peroxide Diethyl peroxide Di-t-butyl-di-peroxyphthalate Difuroyl peroxide Dibenzoyl peroxide Dimeric ethylidene peroxide Dimeric acetone peroxide Dimeric cyclohexanone peroxide Diozonide of phorone Dimethyl ketone peroxide Ethyl hydroperoxide Ethylene ozonide Hydroxymethyl methyl peroxide Hydroxymethyl hydroperoxide 1-Hydroxyethyl ethyl peroxide 1 -Hydroperoxy-1 -acetoxycyclodecan-6-one Isopropyl percarbonate Isopropyl hydroperoxide Methyl ethyl ketone peroxide Methyl hydroperoxide Methyl ethyl peroxide Monoperoxy succinic acid Nonanoyl peroxide (75% hydrocarbon solution) 1-Naphthoyl peroxide Oxalic acid ester of t-butyl hydroperoxide Ozonide of maleic anhydride Phenylhydrazone hydroperoxide Polymeric butadiene peroxide Polymeric isoprene peroxide Polymeric dimethylbutadiene peroxide Polymeric peroxides of methacrylic acid esters and styrene... 

Dibenzoyl peroxide, Ethylene See Ethylene Carbon tetrachloride... 

By-products of the above reactions are 1,2,6-tribenzoyl-D-mannitol and 1,2,6-tribenzoylsorbitol. The structure of the first was shown in two ways. Brigl and Griiner converted it to the known 1,2,5,6-tetra-benzoyl-3,4-isopropylidene-D-mannitol. Hockett and Fletcher oxidized it to dibenzoyl-D-glyceraldehyde with lead tetraacetate. This, and the fact that the rate of oxidation was like that of glycerol, not of ethylene glycol, established the structure. 1,2,6-Tribenzoylsorbitol consumed... 

Dibenzoyl Peroxide Diisobutyl Ketone Ethylene Dibromide Ethylene Dibromide Di-N-Butylamine Di-N-Butylamine... 

Hydroxylamine Sulfate Diethylene Glycol Beta-Propiolactone Nitrogen Tetroxide Ethylene Oxide Benzophenone Benzophenone Diethylene Glycol Oxygen, Liquefied Dibenzoyl Peroxide Catechol Cresols... 

Furo[3,4-J]pyridazines have also been used in Diels-Alder reactions (331a with maleic anhydride, acrylic acid, 1,4-naphthoquinone, dibenzoyl-ethylene, 1,4-benzoquinone, benzo[c]furandione ° 331c with maleic anhydride) 331a has been shown to be more reactive than 331c. 1,3-Diphenylfuro[3,4-b]quinoxaline (335) has been obtained from phthalide 334 (Eq. 17) as a green crystalline, quite stable solid (mp 244-246°C). In DMSO (deep blue solution), 335 reacts instantaneously with such dienophiles... 

Among other important practical methods, the reaction of unsaturated ketones, in particular, dibenzoyl ethylene 30, with -diphenylsulfimide 31 [47, 48] should be mentioned. The yields of the target aziridines 32 in this case are high and sometimes close to quantitative (Scheme 1.9). 

Dibenzoyl peroxide Carbon tetrachloride, Ethylene See also WAX FIRE... 

Recall that the initiation step generates the radicals. In this case the weak oxygen-oxygen bond of the initiator, dibenzoyl peroxide, cleaves to produce two benzoyloxy radicals. A benzoyloxy radical then adds to the CC double bond of an ethylene molecule ... 

DBPO DBU DCC DDQ DEAD DET DIBAL-H DIPT DMAP DMB DME DMF DMPU DMSO EDDA Eu(dppm)3 Eu(fod)3 dibenzoyl peroxide 1.8- diazabicyclo [ 5.4.0] undec-7-ene dicyclohexylcarbodiimide 2.3- dichloro-5,6-dicyano-l,4-benzoquinone diethyl azodicarboxylate diethyl tartrate diisobutylaluminium hydride diisopropyl tartrate iMM-dimethylaminopyridine 3.4- dimethoxybenzyl 1.2- dimethoxyethane dimethylformamide 1.3- dimethyl-3,4,5,6-tetrahydro-2(lH)pyrimidinone dimethyl sulfoxide ethylene diammonium diacetate di(perfluoro-2-propoxypropionyl)methanato europium 6.6.7.7.8.8.8- heptafluoro-2,2-dimethyl-3,5-octanedionato... 

Polythene is difficult to make and was discovered only when chemists at ICI were attempting to react ethylene with other compounds under high pressure. Even with the correct reagents, radical initiators like AIBN or peroxides (Chapter 39), high pressures and temperatures are still needed. At 75 °C and 1700 atmospheres pressure ethylene polymerization, initiated by dibenzoyl peroxide, is a radical chain reaction. The peroxide is first cleaved homolytically to give two benzoate radicals. 

Dicar bomethoxy-1,3-diphenyl Dimethyl maleate, dibenzoyl-ethylene, maleic anhydride 316... 

Zinc. Beduction of ethylene oxides with xinc is scarcely ever used, but a few illuairatitnis may be cited briefly. Lut and eo-workers used zinc to cause reductive cleavage of ItS-dibenzoyl and l>2-dkaesitoyl ylene oxides in aoetic acid and ethandic ammonium chloride reepoctivoly (Eq. 336). 

Either triphenylarsonium benzoylylide or dibenzoylylide form complexes with bis(l,5-cyclo-octadiene)nickel these oligomerise ethylene under mild conditions . The dibenzoyl derivative is the more effective catalyst of the two, this being ascribed to the greater stabilization provided by the second benzoyl group the monobenzoyl derivative provides largely linear alkenes, but the dibenzoyl derivative leads to decreased linearity in the products. 

Phosphorylation of alcohols and amines forming mixed esters of phosphoric acid and phosphorami-dates, respectively, is effected by triphenylphosphine and 2,2 -dipyridyl disulfide. The reaction passes through a triphenylphosphonium phosphate of type (68 equation 44) as an active intermediate. Formation of an intemucleotide linkage can be achieved by this method. °° Dimerization of monoesters of phosphoric acid producing dialkyl pyrophosphates is achieved using tributylphosphine and dibenzoyl-ethylene or p-quinonedibenzimide (equation 45). A phosphonium phosphate is the active intermediate of this reaction. ... 

Alkylation of alkyl methyl- and phenylphosphinates can also be achieved by radical addition to alkenes. Benschop and Platenburg reportedthat addition of menthyl methylphosphinate to cyclohexene and to ethylene, initiated by dibenzoyl peroxide or u.v. light, gave menthyl cyclohexylmethyl-phosphinate and menthyl ethylmethylphosphinate, respectively, with essentially complete inversion of configuration at phosphonis. In contradistinction,... 

With Phosphorus Pentachloride. On heating with phosphorus oxychloride and phosphorus pentachloride, tetraphenylfuran undergoes ring fission, with the formation of a derivative of dibenzoyl-ethylene ... 

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