4-Methoxybenzophenone phenyl

UV absorbers have been found to be quite effective for stabilization of polymers and are very much in demand. They function by the absorption and harmless dissipation of the sunlight or UV-rich artificial radiation, which would have otherwise initiated degradation of a polymer material. Meyer and Geurhart reported, for the first time in 1945 [10], the use of UV absorber in a polymer. They found that the outdoor life of cellulose acetate film was greatly prolonged by adding phenyl salicylate (salol) [10]. After that, resorcinol monobenzoate, a much more effective absorber, was introduced in 1951 [11] for stabilization of PP, but salol continued to be the only important commercial stabilizer for several years. The 2,4-dihydroxybenzophenone was marketed in 1953, followed shortly by 2-hydroxy-4-methoxybenzophenone and other derivatives. Of the more commonly known UV absorbers, the 2-hydroxybenzophenones, 2-hy-droxy-phenyl-triazines, derivatives of phenol salicylates, its metal chelates, and hindered amine light stabilizers (HALS) are widely used in the polymer industry. 

The five-coordinate complexes Ir(CO)(PPh3)2L, where HL = /3-diketone, A-benzoyl-A-phenyl-hydroxylamine, salicylaldehyde, 8-hydroxyquinoline, 2-hydroxybenzophenone, 2-hydroxy-8-methoxybenzophenone, were prepared from [Ir(CO)(PPh3)2Cl].632 The resulting compounds all underwent oxidative addition reactions with Br2. Reaction of [(cod)2IrCl]2 with N-substituted 3-hydroxy-2-methyl-4-pyridine gives the bichelated complex (389). 33... 

Poly[styrene-co-(2-hydroxy-4 -vinylbenzophenone)] was less efficient in PS than 2-hydroxy-4-methoxybenzophenone [334]. Similarly, PE films doped with 4-dodecyloxy-2-hydroxybenzophenone (0.1 mol%) were more stable than PE doped with copolymers of ethylene with polymerisable benzophenones having a comparable content of chromophores [54]. The efficiency of a SAN type LS, a terpolymer of 2-hydroxy-4-(4-vinylbenzyloxy)benzophenone with acrylonitrile and styrene did not exceed that of conventional LS [84]. No efficiency loss of 2-hydroxy-4-methacryloyloxybenzophenone in ABS was observed after bonding into a terpolymer with styrene and acrylonitrile. The homopolymer was slightly inferior to both the monomer and terpolymer [84]. A better protection of PP was provided by poly[(2-hydroxy-3-allyl-4-methoxyphenylbenzophenone)-co-dibutyl maleate] than with 2-hydroxy-3-allyl-4-methoxybenzophenone [335] (stabilization tests were performed in the presence of phenolic antioxidants). A comparable or better light stabilizing efficiency of poly[vinyl acetate-co-(5-methylacryloyloxy salicylate)] or poly(2-allylphenyl salicylate-co-dioctyl maleate) than that of alkyl-phenyl salicylates was observed in polyolefins [335]. 

TTie Ligand This salen type ligand is easily obtained by condensation between ethylenediamine and 2-hydroxy-4-methoxybenzophenone. The methoxy groups offer various possibilities for an arrangement of the molecule in the crystal lattice. In contrast with this flexible part, the rotation of die phenyl groups is retarded in solution. This is easily proven by C NMR spectroscopy of crmpounds 2b, 2d, 2e, 2f, and 2g. There are always two more aromatic NMR signals due to diastereotopic o- and m- positions at the phenyl groups. 

Dichlorobenzophenone Phenyl benzoate 4 -Methoxybenzophenone Acetophenone 0-Dibenzoyl benzene... 

In the case of asymmetric diaryl ketones, migration of aryl groups with electron-donating substituents occurs preferentially . For instance, p-methoxybenzophenone affords 96% of (4-methoxy)phenyl benzoate by oxidation widi trifluoroperacetic acid, whereas p-nitrobenzophenone under the same reaction conditions gives 95% of phenyl 4-nitrobenzoate. 

CAS 131-57-7 EINECS/ELINCS 205-031-5 Synonyms 2-Hydroxy-4-methoxybenzophenone (2-Hydroxy-4-methoxy-phenyl) phenylmethanone Methanone (2-hydroxy-4-methoxyphenyl) phenyl- 4-Methoxy-2-hydroxybenzophenone Oxybenzone Classification Organic benzophenone deriv. 

Obtained by total dealkylation of 5-tert-butyl-2 -chloro-2-methoxybenzophenone with aluminium chloride in benzene at 65-70° for 45 h (60-80%) [22], (73%) [9], Also obtained by Fries rearrangement of phenyl o-chlorobenzoate (SM) with aluminium chloride [23,897], at 140° for 30 min (32%) [485]. SM was prepared by heating o-chlorobenzoyl chloride with aluminium tris(phenoxide) in a water bath for 30 min [485],... 

Preparation by oxidation of 6-methoxy-2-phenyl-3-(4-chlorophenyl)benzofuran with chromium trioxide in boiling acetic add for 40 min, followed by saponification of the resulting keto ester—2-(benzoyloxy)-4 -chloro-4-methoxybenzophenone— with 4 N sodium hydroxide in refluxing ethanol for 1 h [44]. 

Hydroxymethanesulfinic acid monosodium salt Hydroxymethanesulfinic acid sodium salt. See Sodium formaldehyde sulfoxylate 2-Hydroxy-4-methoxybenzophenone (2-Hydroxy-4-methoxyphenyl) phenyl-methanone. See Benzophenone-3 (Hydroxymethyl) benzene. See Benzyl alcohol N-(Hydroxymethyl)-N-(1,3-dihydroxymethyl-2,5-dioxo-4-imidazolidinyl)-N -(hydroxymethyl) urea. See Diazolidinyl urea 2-Hydroxy-1-methylethanol. See Isopropanolamine 2-Hydroxymethylfuran. See Furfuryl alcohol... 

Phenyl salicylate, resorcinol monobenzoate, 2-hydroxyl-4-methoxybenzophenone, 2-(2-hydroxyphenyl)-benzotriazole, etc. 

---