4- Nitro- -dinitril

Heptandisaure 4-(2-Cyan-ethyl)-4-nitro- -dinitril E5, 1518 E16d, 210 (Michael-Addition) Pyridazino 4,S-d pyridazin 5,8-Dimethoxy-1,4-dimethyl- E9c, 340 (Cl -v OR)... 

Elimination of the hydroxyaminomethyl moiety from nitro oxime 15 by treatment with a diazonium salt gave hydrazone 43 (75LA1029) (Scheme 15). The same product was obtained by coupling the diazonium salt with the compound 16. On heating in aniline, oxime 15 was transformed into Schiff base 42. Acylation of the oxime 15 with benzoyl chloride in pyridine led to a mixture of furazan 44 and dinitrile 45. 

Reduction of nitrostyrene with aqueous TiCl3 gives a 3,4-diarypyrrole directly in moderate yield (Eq. 10.46).52 The reaction proceeds via dimerization of anion radicals of nitrostyrene and reduction of the nitro function in the dimer to imines. Reduction of dinitrile with diisobutylalu-minum hydride (DIBAL) gives a-free pyrroles (Eq. 10.47) 53 both reactions may proceed in a similar mechanism. These pyrroles are useful intermediates for functionalized porphyrins. 

Die Michael-Addition von Nitro-methan an Acrylnitril in Acetonitril (2,5 h 81 °)2 oder in 1,4-Dioxan/Tetrabutylammoniumhydrogensulfat3 unter Basen-Katalyse fuhrt zu 4-(2-Cyan-ethyl)-4-nitro-heptandisdure-dinitril (72 bzw. 84%)2,3 ... 

Nitro-diphenylacetonitri le, (CeH6)2C(N02).CN mw 283.24, N 11.76% crysts (from MeOH), mp 44— 46°, dec on heating above 70° was prepd by treating a soln of tetraphenylsuccinic acid dinitrile in chlf with nitrogen dioxide under anhydrous conditions (Ref 2)... 

Benzoyloximino- -dinitril E5, 780 (N-OH - N-O-CO-R) 2-Nitro-benzyliden- -dinitril VIII, 340... 

Malonsaure [Amino-(4-nitro-phenoxy)-methylen]- -dinitril E15/2, 1762 (NC-CH2-CN + R-OCN)... 

Numerous studies have shown that low hydrogen overpotential electrically conducting catalysts (e.g., Raney nickel, platinum and palladium on carbon powder, and Devarda copper) can be used to electrocatalyticaUy hydrogenate a variety of organic compounds including benzene and multiring aromatic compounds, phenol, ketones, nitro compounds, dinitriles, and glucose [45, 46, 54, 55, 67-71]. These reactions have been carried out in both batch and semicontinuous flow reactors in most cases, the reaction products were similar to those obtained from a traditional chemical catalytic scheme at elevated temperatures and pressures. 

Raney catalysts are used in a broad range of industrial hydrogenations. These include reductions of nitriles and dinitriles (e.g. for nylon intermediates), aldehydes (e.g. for sorbitol or alkane diols), olefins and alkynes (e.g. for monomer purification) and aromatic nitro compounds (e.g. for urethane intermediates). 

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