2- Methyldiphenyl

This is obtained in the usual manner from 3-nitro-2-methyldiphenyl-aminc-O -arsinic acitl. It crystallises from benzene in thick ydlow prisms, M.pt. 2Ui-5" C. 

In the polycyclic field it has been reported that 2-methyldiphenyl-2 -N,N-diethylcarboxamide with excess lithium diethylamide in tetrahydrofuran at 0°C, by subsequently warming during 3 hours to ambient temperature gave... 

The substituted 2-hydroxybenzophenone, 2-(2-hydroxy-4-di-n-butylamino)-benzoylbenzoic acid underwent reaction with 4-methoxy-2-methyldiphenyl-amine in concentrated sulphuric acid at 10-1 during 20 hours followed by work-up in alkaline solution and a final treatment by refluxing in hot toluene for 2 hours to give 2-anilino-3-methyl-6-dibutylaminofluoran in 88% yield (ref.81). 

Related Reagents. t-Butyl Trimethylsilylacetate NJi-Dimethyl-2-(trimethylsilyl)acetamide Ethyl 2-(Methyldiphenyl-silyljpropanoate Ethyl Trimethylsilylacetate TrimethylsUyl-acetic Acid Trimethylsilylacetone. 

At the same, time attempts to apply this approach to the synthesis of phenotel-lurazine and its A-methyl derivative using diphenylamine and A-methyldiphenyl-amine as starting materials failed [83JOM(251)223 85KGS757]. The parent phe-notellurazine 35 (M = NH, R = R = H) has been prepared in low yield (7%) by refluxing an acetic acid solution of 4-trichlorotellurodiphenylamine 39 (89H1007). 

The smooth intramolecular nucleophilic displacement of biphenyl carboxylic acids leading to benzocoumarins (See Section II.A.) inspired also investigation of the behavior of similar diphenyl ether, diphenyl sulfide and A-methyldiphenyl amine derivatives 458 under similar conditions. However, all these attempts to achieve cyclization to tricyclic compounds 459 were unsuccessful, probably due to the unfavorable stereochemistry for the formation of the required seven-mem-bered transition states and also to the presence of the deactivating bridge groups X (Eq. 42) [68JCS(C)1030]. 

Phosphine, methyl-, 2, 992 Phosphine, methyldiphenyl-, 2,992 Phosphine, methylenebis(diphenyl-, 2, 993 Phosphine, methylphenylpropyl-complexes inversion, 1,199... 

Phenyltrimethoxysilane 75 is activated by fluoride anion to 76, which undergoes palladium-catalyzed couphng with 4-methyliodobenzene 77 to give a nearly quantitative yield of 4-methyldiphenyl 78 [90]. Such Heck-, Stille-, or Suzuki-type C-C coupling of arylsilanes such as 75 were recently reviewed [91] (Scheme 2.12). 

In 1926 Harrison et al. (20) described the first resolutions of 4 -amino-4-methyldiphenyl sulfoxide 7 and / -carboxyphenyl methyl sulfoxide 8 into the enantiomeric forms via formation and crystal-... 

An alternative synthesis of 4-nitrodibenzothiophene involves heating 2-amino-2 -nitrodiphenyl sulfide in a sealed tube at 190° (20%). The reaction probably proceeds via homolytic cleavage of the derived diazonium ion which could have been formed from nitrous acid liberated during the formation of phenothiazines, which were also detected. Similarly, 2-methyl-4-nitrodibenzothiophene is formed from 2-amino-2 -nitro-4 -methyldiphenyl sulfide (10%), and in this case the intermediacy of the diazonium ion was further indicated in that the same material was obtained by pyrolysis of the separately prepared diazonium salt of the sulfide. Although yields are poor in this reaction, it nevertheless represents the only route to substituted dibenzothiophenes containing a nitro substituent in the 4-position and as such is worthy of further attention. 

Hexanitromethylphenylether or Hexanitro-4-methyldiphenyl ether. (02N)3C6H20C6H(CH3) (N02)3 (Note — The position of the N02 groups has not been established) mw 452.23,... 

Aryl sulfonates RS03Ar (R = C6H5, CH3) were found to undergo photochemical rearrangement upon irradiation with uv-light.8,9 In the case of phenyl p-toluenesulfonate (20), products originating from the photo-Fries reaction were identified as 2-hydroxy-4 -methyldiphenyl sulfone (21), 4-hydroxy-4 -methyldiphenyl sulfone (22), and phenol (23). 

PChH , Phosphine, dimethylphenyl-iron complex, 26 61 PC, Hn, Phosphine, diphenyl-manganese complex, 26 158, 226-230 ruthenium complex, 26 264 PC 3H27, Phosphine, tributyl-iron complex, 26 61 PC,H , Phosphine, methyldiphenyl-iron complex, 26 61 PC, H Phosphine, triphenyl-cobalt complex, 26 190-197 cobalt-gold-ruthenium, 26 327... 

Arsine, 3-dimethylarsinopropylbis(but-3-enyl)-, 1010 Arsine, dimethylphenyl-, 1006 Arsine, ethylenebis(dichloro-, 1005 Arsine, ethylenebis(dimethyl-, 1006 Arsine, ethylenebisfdiphenyl-, 1006 Arsine, ethylidynetris(methylenebis dimethyl-, 1007 Arsine, iododimethyl-, 1005 Arsine, methyldiphenyl-, 1006 Arsine, o-phenylenebis(dichloro-, 1005 Arsine, o-phenylenebis(dimethyl-, 1006 metal complexes, 499... 

The main product of the interaction of o-cresol with selenium oxychloride is tri-4-hydroxytri-3-methyltriphenyIselenonium chloride, and di-4-hydroxydi-3-methyldiphenyl selenide is formed as a byproduct. 

Preparation 59.—2-p-Toluoylbenzoic Add (4-Methyldiphenyl Icetone-2 -carboxylic acid). 

Methyldiphenyl Ether from 4-Methyl-4 -aminodiphenyl Ether. 297... 

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