Biphenyl, 2-nitro

Biphenyl, 2-nitro- Biphenyl, 2-nitro-. See2-Nitro-1,1-biphenyl... 

Bilobalide, 150 Bilobetin, 152 Biochanin A, 415 Biotin, 140, 277 Biphenyl, chloro subs, 87 Biphenyl, nitro subs, 286 Biphenyl-4,4 -dicarboxylic acid alkyl esters, 118... 

The nitration of nitro- and dinitro-biphenyls has been examined by several workers. i - As would be expected, nitration of the nitro-biphenyls occurs in the phenyl ring. Like a phenyl group, a nitrophenyl group is 0 -directing, but like certain substituents of the type CH CHA ( 9.1.6) it is, except in the case of w-nitrophenyl, deactivating. Partial rate factors for the nitration at o °C of biphenyl and the nitro-biphenyls with solutions prepared from nitric acid and acetic anhydride are given below. The high o p-v2X o found for nitration of biphenyl... 

By analogy, thermal cyclization was described also for 6-nitro-2 -hydroxy-biphenyl-2-carboxylic acids, e.g. 14, obtained by other methods. The same product 15 was also formed from lactone 17, prepared by oxidation of fluorenone 16 (Scheme 2). If the reaction was performed in DMF, the corresponding dimethylamide was isolated (82KGS703, 86KGS852, 87KGS314, 89MI1). 

So liefert die Reduktion von Anthracen in Gegenwart von Methyl- oder tert.-Butylchlo-rid Alkyl-dihydro-anthracene4 und 4-Jod-l-nitro-benzol, in Gegenwart von Benzol rcduziert, 4-Niiro-biphenyl (in CH3CN, 20% d. Th.)2. Analog verhalt sich Toluol5. 

Aus 2-Nitro-2 -formyl-biphenyl wird bei -1,05 V 41°/0d.Th. Phenanthridin, bei -0,7 V iiberwiegend das entsprechende 5-Oxid erhalten4 ... 

Hydroxy-phenanthridin ist das Hauptprodukt der Reduktion von 2-Nitro-2 -carb-oxy(bzw. athoxycarbonyl)-biphenyl in waBrig athanolischer Losung an Quecksilber1 ... 

Dimethylamino-methyl)-2-hydroxymethyl-aus 2 -Carboxy-2-(dimethylaminocarbonyl)-biphenyl und Lithiumalanat 165 2,2 -Dinitro- 474, 476, 695 6,6 -Dinitro-2,2 -bis-[chlorcarbonyl]- 188 2,2 -Dinitro-4,4 -bis-[diathylamino]- 695 4,4 -Dinitro-2,2 -bis-rhydroxymethyl]- 213 6,6 -Dinitro-2,2 -bis-[hydroxymethyl]- 188 2,2 -Dinitro-4,4 -diamino- 695 6,6 -Dinitro-2,2 -diformyl- 694 4,4 -Dinitro-2,2 -dimethoxycarbonyl- 213 2,2 -Dinitro-4,4 -dimethyl- 695 6,6 -Dinitro-2 -formyl-2-carboxy- 694 2,2 -Dinitroso- 476 -4-hydroxamsaure-chlorid 537 4-(a-Hydroxy-benzyl)- 542 Methoxy- 678 2-Methyl- 556 Nitro- 672, 678 4-Nitro- 687... 

Methoxy-4 -nitrobiphenyl 1,1 -Biphenyl, 4-methoxy-4 -nitro- (9) (2143-90-0) 4-Nitrophenyl trifluoromethanesulfonate Methanesulfonic acid, trifluoro-, p-nitrophenyl ester (8) Methanesulfonic add, trifluoro-, 4-nitrophenyl ester (9) (17763-80-3)... 

METHOXY-4 -NITROBI PHENYL (1,1 -Biphenyl, 4-methoxy-4 -nitro-)... 

The checkers found that using tetrakis(triphenyiphosphine)paliadium(0) as the catalyst and dioxane as the solvent resulted in significant reduction of the nitro-substituent in the coupled product.9 Biphenyls 3 and 5 are obtained in ratios as high as one to one under these conditions. 

Photodecarboxylation of similar but nitro group free substrates have also been verified, however. N-2-chlorophenylglycine and (although less efficient) a-phenylthio-acetic acid have been decarboxylated by irradiation in acetonitrile solution in the presence of 1-nitronaphthalene, 4-nitro-biphenyl, 1,4-dinitrobenzene, 4-nitrotoluene and nitrobenzene... 

Synonyms AI3-00635 BA 2794 CCRIS 443 EINECS 202-204-7 4-Nitro-l,l -biphenyl 4-Nitro-diphenyl p-Nitrobiphenyl NSC 1324 4-Phenylnitrobenzene p-Phenylnitrobenzene PNB. 

Nitro-l,l -biphenyl, see 4-Nitrobiphenyl p-Nitrobiphenyl, see 4-Nitrobiphenyl Nitrocarbol, see Nitromethane 4-Nitrochlorobenzene, see p Chloronitrobenzene p-Nitrochlorobenzene, see p Chloronitrobenzene Nitrochloroform, see Chloropicrin Nitrochloropropane, see 1-Chloro-l-nitropropane... 

Biphenyl-2,2 -dicarboxaldehyde similarly gave 2-nitro-2-methyl-4.5 6.7-dibenzo-cycloheptadien-l,3-diol (72) in 51% yield 28). 

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