Benzyl peroxide

A strong acceptor TCNE undergoes [2+2] rather than [4+2] cycloaddition reactions even with dienes. 1,1-Diphenylbutadiene [20] and 2,5-dimethyl-2,4-hexadiene (Scheme 5) [21] afford mainly and exclusively vinyl cyclobutane derivatives, respectively. In the reactions of 2,5-dimethyl-2,4-hexadiene (1) the observed rate constant, is greater for chloroform solvent than for a more polar solvent, acetonitrile (2) the trapping of a zwitterion intermediate by either methanol or p-toluenethiol was unsuccessful (3) radical initiators such as benzyl peroxide, or radical inhibitors like hydroquinone, have no effect on the rate (4) the entropies of activation are of... 

BOBZIB) Alkyl allyl peroxides, alkyl benzyl peroxides, and allyl propargyl peroxides l-Metbyl-6,10-dimetbylene-9-metbylperoxy-4-oxatricyclo[7.4.0.0 ]tridecan-5-one 1.478 151.7 150... 

Table 1. Skin tumour responses to treatment with carcinogens and/or benzyl peroxide in mice...

Di (hydroxybenzyl)-peroxide see Bis (a-hydroxy-benzyl)-peroxide 2 B145... 

In the absence of hydrochloric acid, telomeriration occurred, yielding very high molecular weight telo-mer (Expt. 28). Hanford and Roland (3) found that the benzyl peroxide-induced reaction of dioxane with ethylene at 80 C resulted in products formed by reaction of 54 mols of ethylene per mol of p-dioxane. In Expt. 28 using di-t-butyl peroxide at 130 -140 14 mols of ethyl-... 

This rearrangement proceeds via a 2,3-peroxy radical mechanism4,5 24. Radicals are probable intermediates as these reactions are initiated or accelerated by light or free radical sources (benzyl peroxides, tert-butyl hyponitrite) 2 6, are inhibited by radical scavengers (4-methyl-2,6-di-/ert-butyl phenol)6,7, and display ESR signals of allyl peroxy radicals7-9. 

Pentryl. See 2-(2 , 4, 6-TrInitro-N-nitranilino Ethanol Nitrate under Aniline ethanol and Derivatives A425-L to A42 )-R Pentryl Homologs A429-R Peracetic Acid, Benzylester. See Acetyl-benzyl peroxide A55-L P hen acyl Azide. See a>-Azido acetophenone under Acetophenone A47-R Phenazone. See Antipyrine A471-R Phenetidine. See Aminophenetole A240-R Phenyl Abietate. See under Abietic Acid A4rL... 

Bolland, J.L. Kinetic studies in the chemistry of rubber and related materials. VI. Benzyl peroxide-catalyzed oxidation of ethyl linoleate. Trans. Faraday Soc. 1948, 44, 669-677. 

The Gif oxidation of aralkanes involving /-BuOOH, FefNOi) 9H2O, pyridine, HOAc (the so-called GoAgg system) gives mixed benzylic peroxides. The addition of MX (M=Li, Na, EtjN X=C1, N3, NCS, CN, NO2,...) enables functionalization of hydrocarbons to afford alkyl chlorides, azides, thiocyanates, cyanides, nitroalkanes, etc. ... 

BPO benzyl peroxide CaCO, calcium carbonate (lime)... 

Head-to-head PVAc Benzyl peroxide, 25-110°C, 1,2 diol content 1.23-1.95 mol % (11)... 

C7H F] Thermolysis of benzyl peroxide in benzyl fluoride or thermolysis of a-fluorophenyl peracetate/ Benzyl fluoride CIDNP/ 393 79Betl... 

The possible mechanism of grafting maleated sulfur pre-vulcanized NR (M-SPNR) with cellulose fibre by using benzyl peroxide (BPO) and K2S2O8 at 80 °C is shown in Figure 13.21. Free radicals from BPO activate the carbon-carbon double bonds of MA, which then react with carbon arbon double bonds of SPNR molecules activated by K2S2O8 to form the M-SPNR. When the M-SPNR reacts with cellulose fibre, the M-SPNR-g-cellulose fibre is... 

Antibiotics that affect Propionibacterium acnes are a standard treatment for acne, but antibiotic resistance is becoming prevalent. A preliminary study of 126 patients showed that topical 2% essential oil of Ocimum gratissimum (thymol chemotype) in a hydrophilic cream base was more effective than 10% benzyl peroxide lotion at reducing the number of lesions when applied twice daily for 4 weeks (Ora diya et al., 2002). 

For the synthesis of phenol polymers by peroxidase catalysis, the oxidation of aromatic electron donors in the presence of peroxides is of importance. Typical peroxides used in combination with peroxidases are hydrogen peroxide, alkyl peroxides, and benzyl peroxide. Typical substrates are electron-rich aromatic compoimds like phenols and anilines. This function of peroxidases was first discovered in 1855 with the oxidation of guaiacol by peroxidases in the presence of hydrogen peroxide [56]. More systematic investigations and... 

Thin layer chromatography has also been applied to reactive organic peroxide residues such as tertiary butyl perbenzoate and benzyl peroxide in polystyrene (Method 34). 

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