Quinolines benzo

It would be expected that the stabilization of the adsorbed species by an extended conjugated system should increase with the number of aromatic rings in the adsorbed azahydrocarbon. However, data suitable for comparison are available only for phenanthridine, benzo-[/]quinoline, and benzo[h] quinoline. The large difference in the yields of biaryl obtained from the last two bases could be caused by steric interaction of the 7,8-benz-ring with the catalyst, which would lower the concentration of the adsorbed species relative to that with benzo[/]quinoline. The failure of phenanthridine to yield any biaryl is also noteworthy since some 5,6-dihydrophenanthridine was formed. This suggests that adsorption on the catalyst via the nitrogen atom is possible, but that steric inhibition to the combination of the activated species is involved. The same effect could be responsible for the exclusive formation of 5,5 -disubstituted 2,2 -dipyridines from 3-substi-tuted pyridines, as well as for the low yields of 3,3, 5,5 -tetramethyl-2,2 -bipyridines obtained from 3,5-lutidine and of 3,3 -dimethyl-2,2 -... [Pg.196]

The sonochemistry of the other alkali metals is less explored. The use of ultrasound to produce colloidal Na has early origins and was found to greatly facilitate the production of the radical anion salt of 5,6-benzo-quinoline (225) and to give higher yields with greater control in the synthesis of phenylsodium (226). In addition, the use of an ultrasonic cleaning bath to promote the formation of other aromatic radical anions from chunk Na in undried solvents has been reported (227). Luche has recently studied the ultrasonic dispersion of potassium in toluene or xylene and its use for the cyclization of a, o-difunctionalized alkanes and for other reactions (228). [Pg.107]

Benzo [A] quinoline, Benzo [/] quinoline, and Benzo [c] phenanthridine Derivatives... [Pg.345]

Benzo(/)quinoline (147) was reacted with EMME at 170°C for 3 hr to yield (benzo(/)quinolin-l-yl)methylenemalonate (148) (84USP4456606). [Pg.50]

Benzo[/]quinoline (13 R=H) on nitration at -15 °C gives 7-nitrobenzo[/]quinoline (40%) (13 R = N02) together with smaller amounts of the 10- (13%) and 9-nitro derivatives (9%). At 0 °C the 7,9-dinitro derivative is obtained. Nitration of benzo[/]quinoline AT-oxide gives 7-nitrobenzo[/]quinoline Af-oxide. [Pg.319]

Hydrogenation of benzo[/]quinoline over Raney nickel at 150 °C and 70 atm gives l,2,3,4,7,8,9,10-octahydrobenzo[/]quinoline (52) as the main product, together with some m-l,2,3,4,4a,5,6,10b-octahydro isomer (53 Scheme 38). Use of sodium in pentyl alcohol gives the trans isomer of (53) together with (52) (64JOC1419). [Pg.328]

For electrolyte composition with pyridine and benzo[/]quinoline, see ref. 92 the quinoline El(a value has been used to calculate their Ella values against SCE. e This wave taken into the correlation. [Pg.92]

The infrared (IR) spectra of 1,10-phenanthroline, its hydrate and perchlorate in the region 600-2000 cm-1 have been obtained, and the principal features of the spectra interpreted.66 Further studies on the IR spectra of 1,10-phenanthroline,67-69 substituted 1,10-phenanthrolines,70,71 and 1,7-phenanthroline67 have also been reported. The IR spectrum of 4,7-phenanthroline in the region 650-900 cm-1 has been analyzed, and the C—H out-of-plane deformation frequencies were compared with those of phenanthrene and benzo[/]quinoline.72 The IR spectra of salts of 1,10-phenanthroline have been taken, and the NH vibrations determined.28,73 Infrared spectroscopy has been used to detect water associated with 1,10-phenanthroline and some of its derivatives on extraction into nitromethane from aqueous solution.74 The Raman spectrum of 1,10-phenanthroline has been compared with its IR spectrum.75 Recently, the Raman and IR spectra of all ten isomeric phenanthrolines were measured in solution and solid states, and the spectra were fully discussed.76... [Pg.10]

FIGURE 16.1.7.9.1 Logarithm of vapor pressure versus reciprocal temperature for benzo[/]quinoline. [Pg.187]

The reaction of a-naphthisatin 10 with acetone in a boiling water-alcohol solution of potassium hydroxide gave a 70% yield of the benzo[/]quinoline derivative 11 [18],... [Pg.2]

Studies on the mechanism of the Pschorr reaction have led to a number of interesting cyclizations onto a pyridine nucleus. Hey and Osbond441 were the first to carry out such a reaction 7,8-dihydro-benzo[/]quinoline (211) was obtained in 41 % yield from the N-nitroso-acetanilide (210). The diazonium salt of the amine 212 also underwent cyclization in spite of the presence of a second deactivating... [Pg.341]

Benzo /)quinoline 57JCS252I 62T507 65CCC355 68BSBI8I 74CHE953... [Pg.395]

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