2-acetylphenyl phenyl

Acetylphenyl cthoxycarbonylmethyl tellurium, 2-acetylphenyl phenyl tellurium, and 2-methoxycarbonylphenyl phenyl tellurium lost the alkyl or phenyl groups in refluxing acetic acid containing 30% hydro bromic acid5-7. 

Nitiophenyl 2, 2-nitrophenyl 3, 4-benzoylphenyl 4, 9-anthracenyl 5, 1-anthracenyl 6, 2-anthracenyl 7, 4-(2-(4-pyridyl)vinyl)phenyl 8, 3-acetylphenyl 9, 4-quinolyl 10, 4-acetylphenyl II, 2-quinolyl 12, 4-cyanophenyl 13, 1-naphthyl 14, 2-naphthyl. 

IsopropyI-4-nitrophenyl 2, 4-nitrophenyl 3, 2-methyl-3-nitrophenyl 4, 2-methyl-4-nitrophenyl 5, 3-fluorenyl 6, 1-fluorenyl 7, 2,6-dimethyl-4-nitrophenyl 8, 3-benzoyl-phenyl 9,4-benzoylphenyl 10,9-anthracenyl 11, 3-acetylphenyl 12,4-acetylphenyl 13, 1-naphthyl. 

Methyl 2-(3 -Phenyl-2 -propen-r-oyl)phenyl Tellurium3 A stirred mixture of 12 g (46 mmol) of 2-acetylphenyl methyl tellurium, 17.6 m/(18.4 g, 170 mmol) of benzaldehyde, 88 mlof acetic acid, and 35 ml of piperidine is heated under reflux for 6 h. The mixture is then steam-distilled to remove unreacted benzaldehyde. The resultant red oil is separated by extraction with chloroform, the extract is evaporated, and the residue is fractionally distilled under vacuum. The fraction boiling above 200°/0.1 torr is collected and redistilled to give a condensate that should solidify. This solid is recrystallized several times from a mixture of petroleum ether and benzene yield 3.2 g (20%) m.p. 102-104° (from heptane/benzenc). 

Acetylphenyl butyl tellurium is formylated at the acetyl-methyl group by methyl formate and sodium in diethyl ether. The formyl compound is converted to butyl 2-(diazoacetyl)-phenyl tellurium upon treatment with 4-methylbenzenesulfonyl azide1. The diazoacetyl group is converted to the dibromoacetyl group by bromine in diethyl ether1. 

When 2-acetylphenyl tellurium bromide and aromatic aldehydes were refluxed in acetic acid in the presence of piperidine, 2-benzylidene-3-oxo-benzotellurophenes were formed in 80% yields4. These reactions were proposed to proceed via 2-(3-aryl-l-oxoprop-2-en-l-yl)-phenyl tellurium bromides that cyclize with elimination of hydrogen bromide. However, 3-oxo-2,3-dihydrobenzotellurophene cannot be ruled out as the intermediate which then condenses with the aromatic aldehydes2, because 2-acetylphenyl tellurium bromide is known to cyclize to form 3-oxo-2,3-dihydrobenzoteIIurophene2,3. 

Methyl-1-phenyl-1,5-hexadiene was obtained in a similar manner as 3-(4-acetylphenyl)- -butene depicted in 2.4.1. 

The acetyl-methyl group in 2-acetylphenyl methyl tellurium condenses with benzaldehyde to give methyl 2-(3 -phenyl-2 -propen-l -oyl)phenyl tellurium. ... 

When (,S)-l-phenylethyltrifluorosilane of 34% ee was allowed to react with 4-acetylphenyl triflate (a), optically active 1-phenyl-l-(4-acetylphenyl)ethane was isolated. At 50 °C, almost complete retention of configuration resulted, but at higher temperatures the degree of retention dropped linearly and finally inversion resulted above 75 °C (a in Fig. 10-1). A similar temperature dependency was also observed in the case of 3-formylphenyl triflate (b) [30]. 

Finally, the bacterial PTE mentioned above has also been exhaustively studied with regard to its enantioselectivity. Initial studies used the known crystal structure of PTE to identify the substrate-binding pocket. This was then rationally evolved for enhancement and relaxation of the stereospecificity.97 Most recently, a combinatorial library has been screened for the resolution of chiral phosphate, phosphonate, and phosphinate esters.124 This work identified two variants with markedly different preferences for 5p- and Rp-enantiomers of 4-acetylphenyl methyl phenyl phosphate. One variant preferentially catalyzed hydrolysis of the 5p-enantiomer by a factor of 3.7 x 105, while the other preferentially catalyzed hydrolysis of the A p-enantiomer by a factor of 9.7 x 102 - an enantioselective discrimination of 3.6 x 108. 

Nafion-H-silica nanocomposite (13% Nafion-H) catalyzed Fries rearrangement of phenyl acetate at high temperatures gives phenol, ort/zo-acetylphenol, para-acetylphenol and para-acetylphenyl acetate in a ratio of 45 5 24.5 25.5 (equation 69). The rearrangement in the presence of added phenol gives exclusively the para-acetylphenol, showing that the Fries rearrangement under these conditions is intermolecular in nature. ... 

The role of singlet and triplet nitrenium ions in these reactions has been evaluated.228,229 Convincing evidence for the participation of singlet ground-state 2-acetylphenyl nitrenium ions during the photodecomposition of 3-methylanthranils in concentrated sulfuric acid has been obtained.229 For example, in the presence of arenes or anisole, in addition to the usual products, substantial amounts of diphenylamines and 3- and 5-(p-methoxy-phenyl)-2-aminoacetophenones, respectively, are formed by electrophilic attack of the nitrenium ion on the added substrate. 

Atropisomerism in 3-aryl-2-benzyl-4(3H)-quinazolinones was first described by Colebrook et al. The benzyl group at 2 acted as a blocking substituent and as a probe for DNMR study. When the 3-aryl group was a fcete-naphthyl, a 3-bromo-phenyl or a 3-acetylphenyl the DNMR barriers in nitrobenzene were 82.8, 79.1, and 80.3 kj moD, respectively (72TL5239, 75CJC3431). 

Hydrolyses of the glycosidic linkages of phenyl a- and 3-D-glucopyranoside were studied at different alkali concentrations, and the reaction rates increased rapidly above 2M. Mechanisms involving direct hydrolysis and the intermediacy of l,6-anhydro- 8-D-glucose and, with the j3-anomer, the l,2-a-anhydride were proposed. Analogous work with p-acetylphenyl 3- and 5-0-methyl- 3-D-xylo-furanoside led to the conclusion that the 2-oxyanions (and presumably 1,2-anhydrides) were involved as intermediates. ... 

The cross-conpling reaction of an optically active alkylsilane gives us valuable information on the stereochemistry in transmetallation. The reaction of (5)-l-phenyl-l-(trifluorosilyl)ethane (34% ee) with 4-acetylphenyl triflate in the presence of 5 mol % of Pd(PPh3)4 and TBAF (2 eqniv) at 50 C gave (5)-l-phenyl-l-(4-acetylphenyl)ethane of 33% ee with nearly complete retention of configuration. At higher temperatures, ee of the product decreased linearly, and above 75 °C inversion of configuration predominated (Scheme 26). Similar temperatnre dependency was observed also in the reaction of 3-formylphenyl triflate. 

Phenyl cyanate followed by triethylamine added to p-acetylphenyl dicyano-acetimidate (prepared from malononitrile and p-methoxyphenyl cyanate) in... 

Mercuration of 2,4-dimethylthiazole by mercuric acetate in acetic acid yields the 5-mercuriacetyl compound (60), which is reconverted into the starting material by hydrochloric acid, and into the 5-bromo-analogue by halogenation in carbon tetrachloride. In 2-phenyl-4,5-dimethylthiazole, the phenyl nucleus is mercurated preferentially, resulting in 2-(/7-mercuri-acetylphenyl)-4,5-dimethylthiazole (61) in low yield (9%). ... 

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