5-Methyl-2,2 -bipyridyl

Additionally 5-methyl-2,3 -bipyridyl (56) is also present in some varieties of N.tabacum (A.H. Warfield, W.D. Galloway and A.G. Kallianos, Phytochem., 1972, 11, 3371). 

The metallointercalator-DNA conjugates ([Ru ][9.10-phenanthrone quinone diimine]2[4-butyric acid-4 -methyl bipyridyl]-DNA, where DNA is a 20-mer oligonucleotide) attached to the 5 or 3 terminus, were synthesized and separated on a C g column (A = 260 nm or 390 run). A 50/50 water (50 mM armnoniinn acetate buffer at pH 6)/acetonitrile mobile phase generated baseline resolution and elution in 35 min [1198]. 

Numerous diamines and aromatic dianhydrides have been investigated. WhoUy aromatic Pis have been stmctiirally modified by incorporating various functional groups, such as ether, carbonyl, sulfide, sulfone, methylene, isopropjlidene, perfluoroisopropyUdene, bipyridyls, sdoxane, methyl phosphine oxide, or various combinations of these, into the polymer backbone to achieve improved properties. The chemistry and apphcations of Pis have been described in several review articles (4). 

Bipyridyl,4-methyl-4 -vinyl-electrochemical polymerization, 6,25 electropolymerization, 6,16 Bipyridyls bis(ZV-oxide) metal complexes, 2, 496 metai complexes, 2, 89, 90,93 steric effects, 2, 90 2,2 -Biquinolyl... 

The chelation is suggested by the effect of adding 2,2 -bipyridyl and of methylation of the hydroxyl group moreover, Cu ions catalyse the enolisation of ethyl acetoacetate ° . 

Polymeric compounds are formed from 1,3,5-benzene tricarboxylate and zinc with 2,2 -bipyridyl, phenanthroline, or a pyridyl-2-(l-methyl-lH-pyrazol-3-yl) derivative. A number of compounds were characterized with varying ligand protonation and some, such as [ZnL(pyridine-2-(l-methyl-4-nitro-lH-pyrazol-3-yl))(H20)], containing single-stranded coordinative chains.383... 

Palladium-catalyzed reactions of arylboronic acids have been utilized to craft precursors for constructing indole rings. Suzuki found that tris(2-ethoxyethenyl)borane (149) and catechol-derived boranes 150 readily couple with o-iodoanilines to yield 151, which easily cyclize to indoles 152 with acid [158]. Kumar and co-workers used this method to prepare 5-(4-pyridinyl)-7-azaindoles from 6-amino-5-iodo-2-methyl-3,4 -bipyridyl [159], A similar scheme with catechol-vinyl sulfide boranes also leads to indoles [160]. A Suzuki protocol has been employed by Sun and co-workers to synthesize a series of 6-aryloxindoles [161]. 

Kinetic parameters k, often also and AS, occasionally AV ) for formation and dissociation of several pentacyanoferrate(II) complexes [Fe(CN)5L]" have been established. Ligands L include several S- and A-donor heterocycles,4-methyl- and 4-amino-pyridines, a series of alkylamines, 3- and 4-hydroxy- and 3- and 4-methoxy-pyridines, several amino acids, nicotinamide, " 4-pyridine aldoxime, 3-Me and 3-Ph sydnones, several bis-pyridine ligands,neutral, protonated, and methylated 4,4 -bipyridyl, 1,2-bis(4-pyridyl)ethane and traTO-l,2-bis0-pyridyl)ethene, pyrazine- 4,4 -bipyridyl- and bis(4-pyridyl)ethyne-pentaammine-cobalt(III), edta-ruthenium(III), and pentaammineruthenium-(II)and-(III) complexes of... 

P-Azo-[2-methyl-1,2-dicarbadecaborane( 14)], 2624 2-Azoxyanisole, 3653 1,4-Benzenediol-oxygen complex, 2334 Benzeneperoxy sulfonic acid, 2341 Benzeneseleninic acid, 2335 Benzeneseleninic anhydride, 3495 Benzenethiol, 2344 2,2 -Bi-l,3-dithiole, 2215 2,2 -Bipyridyl 1-oxide, 3258 Bis(cyclopentadienyl)lead, 3294 Bis-A(imidosulfurdiiluoridato)mercury, 4342 Bismuth trisulfide, 0234... 

The facility for 4-metalation shown by 3-substituted pyridines is continued with bipyridyl derivatives, and thus 3,3 -bis[2-(trimethyIsilyl)ethoxy]-methyl-2,2 -bipyridine gave the 4,4 -dilithio species on treatment with n-BuLi, and this then afforded 4,4 -disubstituted bipyridines, often in very good yield (Scheme 111)(88HCA957). 

Bipyridyls are by-products in the Chichibabin reaction. The dimerization of methyl-pyridinium salts has been patented, as it provides a route to the important herbicide paraquat (69USP3478042). Pyridine may undergo reduction in the presence of other nftetals as mentioned in Sections 2.05.4.7.5 and 2.05.4.7.6. 

Methyl-4 -vinyl-2,2 -bipyridyl (7 Vbpy) was prepared and the Ru complex of its trichlorosilylethyl derivative was coated on n-Sn02 by condensation of the surface hydroxyl groups 32). Anodic photocurrent obtained at the Ru(bpy)2+ bound n-Sn02 semiconductor electrode was about twice than that obtained at the bare Sn02 dipped in 0.1 N H2S04 solution of Ru(bpy)f +. ... 

Polymer bound tris-(2,2 -bipyridyl)-ruthenium-(II)-derivatives were synthesized by reaction of 4-(3-chloroformyl-propyl)-4 -methyl-2,2 -bipyridyl with crosslinked amino-groups containing poly(styrene) gel or crosslinked sucrose-methacrylate gels, and by... 

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