Benzoyl peroxides naphthalenes

Copolymers of diallyl itaconate [2767-99-9] with AJ-vinylpyrrolidinone and styrene have been proposed as oxygen-permeable contact lenses (qv) (77). Reactivity ratios have been studied ia the copolymerization of diallyl tartrate (78). A lens of a high refractive iadex n- = 1.63) and a heat distortion above 280°C has been reported for diallyl 2,6-naphthalene dicarboxylate [51223-57-5] (79). Diallyl chlorendate [3232-62-0] polymerized ia the presence of di-/-butyl peroxide gives a lens with a refractive iadex of n = 1.57 (80). Hardness as high as Rockwell 150 is obtained by polymerization of triaHyl trimeUitate [2694-54-4] initiated by benzoyl peroxide (81). 

Methyl methacrylate 4-Methylnitrobenzene 2- Methylpyridine Methylsodium Molybdenum trioxide Naphthalene 2-Naphthol Air, benzoyl peroxide Sulfuric acid, tetranitromethane Hydrogen peroxide, iron(II) sulfate, sulfuric acid 4-Chloronitrobenzene Chlorine trifluoride, interhalogens, metals Chromium trioxide, dinitrogen pentaoxide Antipyrine, camphor, phenol, iron(III) salts, menthol, oxidizing materials, permanganates, urethane... 

Benzocyclopropene reacts with a variety of radical reagents (for example A -bromosuccinimide carbon tetrachloride bromotrichloromethane bromoform/benzoyl peroxide alkyl sulfide and ethane-1,2-dithiol with photolysis) to afford products derived from cleavage of the cyclopropane ring. The preferential mode of reaction consists of a chain reaction initiated by radical addition at Cl a followed by opening of the cyclopropyl radical to afford a benzyl radical. Yields are generally low except for the addition of the alkylsulfanyl radical, e.g. formation of 1, and no products derived from addition to the central tt-bond are formed. Cyclopropa[A]naphthalene reacts similarly with radicals and gives 2-methylnapthalene derivatives, while no addition to the central 7i-bond is observed. ... 

Naphtho[l,8-i,c]-l,2-diselenole (24) is formed by the oxidation of l,8-bis(methylseleno) naphthalene with benzoyl peroxide <92CL1437>. 

Allylk chlorination.1 The reagent is useful for chlorination of olefins the reaction is catalyzed by benzoyl peroxide. Yields arc in the range 40-80%. 1-Methyl-naphthalene is converted into 1-ehloromethylnaphthalene in 63% yield. 

Juenge3 has now found that the reagent is effective for nuclear or side-chain halogenation of aromatic systems, the former occurring under ionic conditions, the latter under free-radical conditions. Thus benzene and naphthalene are chlorinated under Lewis acid catalysis 1 -chloronaphthalene can be prepared in 58% yield. Toluene under similar conditions gives a mixture of 2- and 4-chloro-toluene in 66% yield. In the presence of benzoyl peroxide, benzyl chloride is obtained in 44% yield. 

Cationic Polymerization of Methylenecyclobutane. Attempts were made to discover catalyst systems able to attack methylenecyclobutane, and tests were carried out on different classes of catalysts. There was no detectable reaction when using either benzoyl peroxide, or anionic catalysts such as sodium naphthalene. However, interesting re-... 

Photolytic decomposition of peroxides is not v y efBcient in crosslinking. An enhancement effect on the extent of photocrosslinking of polyolefins in the presence of peroxides is displayed by aromatic hydrocarbons such as naphthalene. These transfer the exdtation energy absorbed to a peroxide. This procedure, however, does not represent an important improvement when compared with that refored to earlier, namely the photoreduction of pdyethylene with aromatic ketones and quinones [84. From aromatic ketones and quinones, particulariy bena>phenone [32], chlorinated benzophenones, benzoyl-l-( dohexanol [82], a, -dimethot - hen acdr henone, 2,4,6-trimethyl benzoyl phenyl phosphinic ethyl ester [85], anthrone [86], anthraqui-none [87], naphthoquinone, benzoquinone, and their d vatives have all been examined. 

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