Methoxy benzophenone

Tis((9-propenylphenoxy)diphenyl sulfone. 4,4 Bis(o-methoxy-/)-propenylphenoxy)diphenyl sulfone. 4,4Tis ((9-propen5lphenoxy)benzophenone. 

Pyran-2-one, 4-hydroxy-6-phenacyl-benzophenones from, 3, 686 Pyran-2-one, 4-hydroxy-6-phenyl-synthesis, 3, 795 Pyran-2-one, 4-methoxy-6-substituted... 

The methoxy group of methoxythiophenes shows a reactivity which, in many respects, differs appreciably from the reactivity of the corresponding anisoles. Thus, in an attempted Hoesch synthesis with 5-methoxy-2-thenylcyanide (167) and phloroglucinol, the methoxy group reacted instead and 5-(2, 4, 6 -trihydroxyphenyl)-2-thenyl cyanide (168) was obtained. 2-Thenyl cyanide reacts normally in the Hoesch synthesis, Likewise, upon acid hydrolysis of the reaction product of 5-methoxy-2-thienyllithium with benzophenone, (169) was obtained instead of the expected substituted methoxythiophene. No defined products could be isolated from the attempted Claisen rear-... 

Kinetic studies on the bulk polyesterification of a,o-dicarboxy poly(hexamethylene adipate) with a,polymeric medium. Solomon s mechanism1 can be considered as reasonable. 

Benzophenone-4 (2-benzoyl-5-methoxy-1-phenol-4-sulfonic acid) Chemical Formula... 

Benzophenone-5 (2-hydroxy-4-methoxy-5-sulfonyl benzophenone sodium salt)... 

The quenching of benzophenone phosphorescence has been used by Mar and Winnik (1981) as a photochemical probe of hydrocarbon chains in solution. The bimolecular reaction for quenching the triplet state of 4-methoxy-carbonylbenzophenone [24] by 1-pentene occurs at rates which are below the diffusion limit by two to three orders of magnitude. Consequently, the intramolecular quenching reactions of to-alkenyl esters of benzophenone-4-carbo-xylic acid [25] occurs under conformational control. In [25] the point of... 

The photohydrolysis of 2-fluoro-4-nitroanisole to 2-methoxy-5-nitrophenole is sensitized by benzophenone and completely quenched by sodium sorbate The excited state multiplicity in photoaminations has also been studied. Photolysis of mNA in liquid ammonia yields m-nitroaniline. If the amination is carried out in a large excess of benzophenone, 2-methoxy-4-nitroaniline is formed instead and thus an excited singlet state as reacting species is envisaged in the unsensitized photoamination loo.ioi). it may well be that uptake of the nucleophile present in high concentration successfully competes with intersystem crossing. 

Nonloaded and loaded SLN were already investigated with respect to use in cosmetics. Although adequate controls are difficult to prepare, first experiments indicate an increase in skin hydration and a reduction in wrinkle depth following SLN application [68]. Moreover, cetyl palmitate-nanodispersions act both as particulate ultraviolet (UV) blockers themselves and as carriers for UV absorbing agents (e.g., 2-hydroxy-4-methoxy benzophenone Eusolex 4360). This results in a threefold... 

With m-nitroanisole in liquid ammonia the benzophenone-sensitized reaction yields inter alia 2-methoxy-4-nitroaniline as a product and no m-nitroaniline, which is formed in very high yield upon direct irradiation in liquid ammonia as well as in NH3/CH3OH. In the latter instance l/4> varies linearly with 1/[NH3], suggesting that the reaction is either singlet or triplet but not of a mixed type. 

Very early in the study of photosensitization it was discovered that salicylaldehyde, 2,4-dihydroxybenzophenone, and 2-hydroxy-4-methoxy-benzophenone do not sensitize piperylene isomerization, indicating that enolization is much faster than quenching by the diene.37 Later it was shown that 2-hydroxybenzophenone would sensitize the dimerization of isoprene in concentrated solution, but that the reaction was much less efficient than when benzophenone was used as a sensitizer (Table I).36... 

The direct photolysis of dimethyl diazomalonate in 2-butyne afforded the cyclopropene (276), but sensitization of the photolysis with benzophenone gave the furan (277) in 43% yield (Scheme 73) (71JA6337). Thermal rearrangement of 2,2-dimethoxycarbonylmethyl-enecyclopropane to 2-methoxy-3-methoxycarbonyl-4-methylfuran was observed, a reac-... 

P, pyromellitic dianhydride B, 3,3, 4,4 -benzophenone tetracarboxylic dianhydride 3,5-DAB, 3,5-diaminoben benzophenone 4-MPD, 4-methoxy-m-phenylene diamine 4,4 -DDE, 4,4 -diaminodiphenyl ether 4,4 -DDM, -h The figure in parenthesis is the number of water molecules estimated to be associated with iho corresponding polar gr... 

The condensation of honzaldehydo, p-mcthoxybenzaldehydo, p-nitrobenzaldchyde, and benzophenone with 1,2-epoxy-1 -methoxy-1 -phenyl 2-mothvlpropaiKi in the presence of stannic chloride (Eq. 976a)... 

Exposure to VOCs in public beauty shops can also be high. Many cosmetic products contain VOCs such as 2-phenoxyethanol, 2-butanone, acetone, terpenes, 2-hydroxy-4-methoxy-benzophenone or phenylmethanol. In particular, hair sprays are potential sources of indoor pollutants. To estimate VOC concentrations associated with the use of beauty products, a female subject was placed in the model room described earlier and sprayed with 16.1 g hair lacquer. Propellant gases (butane, pentane), ethanol, limonene and tripropyleneglycol (isomers) were subsequently monitored in the room. Thirty minutes after the application of this product, the highest VOC concentrations were measured for ethanol (>100pg/m3)... 

Figure 3. a, Emissive CIDEP spectrum observed during the photolysis of GAV in ethanol/benzene solution, b, The comparative CIDEP spectrum of the photolysis of 2-methoxy phenol and benzophenone. 

By contrast, the triplet lifetime of benzophenone in ethanol is <100 ns and decays via hydrogen abstraction (72). Molecules with p-methoxy substitution do not abstract hydrogen readily, due to the tt-tt nature of their low-lying triplet state. The long triplet lifetime of acetoveratrone reflects die unreactivity of this molecule towards... 

Yesudian, P.D. and King, C.M., Severe contact urticaria and anaphylaxis from benzophenone-3 (2-hydroxy 4-methoxy benzophenone), Contact Dermatitis, 46, 55, 2002. 

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