Benzophenone 4-methyl

Tetracosane Phenyl cyclohexane Benzophenone Methyl stearate Lindane (152.2) C24H50 (338.7) C12H16 (160.3) C13H10O (182.2) C19H38O2 (298.5) CgHgClg (290.8) Hydrocarbon Aromatic hydrocarbon Aromatic ketone Aliphatic ester Halogenated hydrocarbon Non-volatile, non-polar, solid Non-volatile, non-polar, liquid Non-volatile, polar, solid Non-volatile, polar, solid Non-volatile, medium-polar, solid Surrogate for limonene Hazardous compound, should be substituted... 

SYNS p-BENZOPHENONE, METHYL- PHENYL p-TOLYL KETONE USAF DO-54... 

BENZOPHENANTHRENE see BBC250 BENZO(def)PHENANTHRENE see PON250 BENZOPHENONE see BCS250 BENZOPHENONE-3 see MESOOO p-BENZOPHENONE, METHYL- see MHF750 BENZOPHOSPHATE see BDJ250... 

Benzophenone, 2-hydroxy-4-(octyloxy)-. See Benzophenone-12 2-Benzophenone, methyl-. See 2-Methylbenzophenone p-Benzophenone, methyl-. 5ee4-Methylbenzophenone Benzophenone, 4-phenyl-. See p-Phenylbenzophenone Benzophenone tetracarboxylate dianhydride 3,3,4,4 -Benzophenonetet-racarboxylate dianhydride. See 3,3, 4,4-Benzophenone tetracarboxylic dianhydride... 

Synonyms 2-Benzophenone. methyl- (2-MethylphenyO phenylmetha-none Phenyl tolyl ketone Phenyl-o-tolyl-methanone Classification Aromatic ketone Empnical C H,20... 

CAS 134-84-9 EINECS/ELINCS 205-159-1 Synonyms p-Benzophenone, methyl- 4-Methyl-p-benzophenone Phenyl p-tolyl ketone Empirical C H,20 Fmnula CHAMfCOCeHs... 

Methylbenzoic acid methyl ester. See p-Cresyl acetate Methyl p-toluate Methyl benzoin. See Benzoin methyl ether Methylbenzol. See Toluene 2-Methyl benzophenone CAS 131-58-8 EINECS/ELINCS 205-032-0 Synonyms 2-Benzophenone, methyl- (2-Methylphenyl) phenylmethanone Phenyl tolyl ketone Phenyl-o-tolyl-methanone Classification Aromatic ketone Empirical C14H12O... 

CAS 134-84-9 EINECS/ELINCS 205-159-1 Synonyms p-Benzophenone, methyl- 4-Methyl-p-benzophenone Phenyl p-tolyl ketone Empirical C14H12O Formula CH3C6H4COC6H5 Properties Colorless to off-wh. cryst. powd. faint odor sol. in alcohols, benzene, ether, chloroform, common org. solvs. insol. in water m.w. 196.26 ... 

Synonyms Benzoic acid, 2-benzoyl-, methyl ester Benzoic acid, o-benzoyl-, methyl ester 2-Benzoyl benzoic acid methyl ester o-Benzoylbenzoic acid methyl ester MBB o-(Methoxycarbonyl) benzophenone Methyl 2-benzoylbenzoate Methyl o-benzoyl benzoate Empirical C15H12O3... 

Aromatic ketones are often named by treating the benzene ring as a phenyl group, as in isopropyl phenyl ketone (Fig. 16.12). A few can be named through the lUPAC system in which the framework Ph—C=0 is indicated by the term ophenone and the remainder of the molecule designated by one of the alternative names in Rgure 16.12. Thus, diphenyl ketone is benzophenone, methyl phenyl ketone is acetophenone, ethyl phenyl ketone is propiophenone, and phenyl propyl ketone is butyrophenone (Fig. 16.12). 

A European collection of 50 recycled food contact PET samples was recently analysed by high-temperature (180°C, 1 h) SHS-GC-MS using three substances (limonene, benzophenone, methyl stearate 1-50 ppm) as external standards for quantification of the contaminants [976]. The results are shown in Fig. 2.45. Maximum contamination levels of 4 ppb were observed. The headspace method was verified by liquid extraction GC-MS. HS-GC-MS showed limits for the extraction of lesser volatiles for which liquid extraction should be applied. 

Chloro-3-ethylbenzoxazolium salts (565) are remarkably versatile reagents the fluoroborate converts a-hydroxy-carboxylic acids into ketones, e.g. benzilic acid into benzophenone, methyl thiocarbamates RNHCSOMe into isocyanates RNCO, ° and alkyl- and aryl-formamides into isocyanides the chloride transforms alcohols into alkyl chlorides. 

Stevens rearrangements proceed smoothly whenever a benzylic group is migrating. For example, ethereal phenyllithium readily deprotonates tetramethylammon-ium bromide to give the lithium bromide-complexed ylide. This species reacts with a variety of electrophiles such as benzophenone, methyl iodide, or molecular iodine. But when the suspension is shaken in a sealed tube for 90 h at ambient temperature, the ylide decomposes entirely to trimethylamine and polymethylene (up to 74%) irrespective of the solvent used (DEE, THE, glyme). The same kind of degradation occurs when phenyllithium is replaced by -butyllithium or phenylsodium. ... 

Radiolytic reduction reactions have been carried out on substrates such as quinones, benzophenone, methyl viologen, and nitroaromatic compounds. In [mtba] [TfjN], the principal reactions were reduction of the substrates by solvated electrons and organic radicals derived from the solvent For example, irradiation of benzoquinone (BQ) or duroquinone (DQ) resulted in the formation of the protonated semiquinone radical, with the proton formed by radiolysis of [mtba] [TfjN] (Equation 5.7). The addition of triethylamine to capture the protons resulted instead in the formation of the semiquinone radical anions (Equation 5.8). 

TTie true ketones, in which the >CO group is in the side chain, the most common examples being acetophenone or methyl phenyl ketone, C HjCOCH, and benzophenone or diphenyl ketone, C HjCOC(Hj. These ketones are usually prepared by a modification of the Friedel-Crafts reaction, an aromatic hydrocarbon being treated with an acyl chloride (either aliphatic or aromatic) in the presence of aluminium chloride. Thus benzene reacts with acetyl chloride... 

Physical properties. Above members all colourless. Acetone, CH3COCH3, b.p. 56 soluble in water, characteristic odour. Ethyl methyl ketone, b.p. 80°, and diethyl ketone, b.p. 102 , are moderately and sparingly soluble in water respectively. Acetophenone,C6H5COCH3, m.p. 20, sparingly soluble, and benzophenone, m.p.48 ,... 

Propiophcnone Benzyl methyl ketone Benzyl ethyl, Benzophenone. p Chloro- ... 

The following liquids may be used (boiling points are given in parentheses) — chlorobenzene (132-3°) bromobenzene (155°) p cymene (176°) o-dichloro-benzene (180°) aniline (184°) methyl benzoate (200°) teti-alin (207°) ethyl benzoate (212°) 1 2 4-trichlorobenzene (213°) iaopropyl benzoate (218°) methyl salicylate (223°) n-propyl benzoate (231°) diethyleneglycol (244°) n-butyl benzoate (250°) diphenyl (255°) diphenyl ether (259°) dimethyl phth ate (282°) diethyl phthalate (296°) diphenylamine (302°) benzophenone (305)° benzyl benzoate (316°). 

Poly(phenylquinoxaline—arnide—imides) are thermally stable up to 430°C and are soluble in polar organic solvents (17). Transparent films of these materials exhibit electrical insulating properties. Quinoxaline—imide copolymer films prepared by polycondensation of 6,6 -meth5lene bis(2-methyl-3,l-benzoxazine-4-one) and 3,3, 4,4 -benzophenone tetracarboxyUc dianhydride and 4,4 -oxydianiline exhibit good chemical etching properties (18). The polymers are soluble, but stable only up to 200—300°C. 

Methyl methacrylate is often used in combination with styrene to improve light transmission and uv stabiUty in fiame-retardant glazing appHcations. Phosphate ester (triethyl phosphate) additives are also included to supplement fiame-retardant efficiency benzophenone uv stabilizers are required to prevent yellowing of these uv-sensitive resins. 

Benzopinacol has been prepared by the action of phenylmag-nesium bromide on benzil 1 or methyl benzilate. Usually it has been obtained by reduction of benzophenone, the reducing agents being zinc and sulfuric acid or acetic acid, aluminum amalgam, and magnesium and magnesium iodide. The present... 

The rates of the reactions of several aromatic ketones with alkyllithium reagents have been examined. The reaction of 2,4-dimethyl-4 -(methylthio)benzophenone with methyl-lithium in ether exhibits the rate expression ... 

While discussing ethers we should mention that the presence of unreacted anisoles or methyl anisoles is highly undesirable in the manufacture of phenol-formaldehyde resoles. These materials tend to be unreactive relative to phenol under normal resole conditions. They are also volatile and have odors detectable at very low concentrations. They have been the source of worker complaints and costly claims in the wood products industry. Benzophenones and methyl phenyl ketones are also common phenol contaminants that are problematic in this regard. 

Using different mono- and diketones in acetic acid (at room temperature) afforded the following products from benzophenone, 2,2-diphenyl-2//-imid-azo[4,5-/]quinoline from dibenzylketone, the 2-benzyl-imidazo[4,5-/]quino-line and from 2,4-pentanedione, 2-methyl-imidazo[4,5-/]quinoline. Cyclohexanone under reflux gave 2-n-pentyl-, whereas at room temperature it afforded the. s pira[cyclohexane-l,2 ]-(2//)-imidazo[4,5-/]quinoline 108 (R R =(CFl2)5) (86UC527). 

Fluproquazone (97) contains a 2-quinazolinone nucleus and is found to be an analgetic agent useful in mild to moderate pain. One of the preparations involves reaetion of 2-isopropylamino-4-methyl-4 -fluoro-benzophenone (96) with potassium cyanate in hot acetic acid [27],... 

Chloro-1 -methyl-6-phenyl4H-s-triazolo-[4,3-a] [1,4] -benzodiazepine A stirred suspension of 5-chloro-2-[3-(bromomethyl)-5-methyl4H-1,2,4-triazol4-yl] -benzophenone (391 mg, 0.001 mol) in tetrahydrofuran (15 ml) was cooled in an ice-bat hand treated with a saturated solution of ammonia in methanol (12.5 ml). The resulting solution was allowed to warm to ambient temperature and stand for 24 hours. It was then concentrated in vacuo. The residue was suspended in water, treated with a little sodium bicarbonate and extracted with methylene chloride. The extract was washed with brine, dried with anhydrous potassium carbonate and concentrated. The residue was crystallized from methylene chloride-ethyl acetate to give... 

A further variant of Method B is the conversion of the readily available aryl(2-methyl-aminoaryl)methanols 16 into the chloroacelyl derivatives 17, followed by oxidation to Ihe benzophenones 18 with chromium(VI) oxide. The products are transformed into benzodi-azepinones by treatment with sodium iodide and ammonium carbonate (Method D). Selected... 

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