Nitroso compounds formamides

However, the potential range within which the spin trap is electro-inactive is considerably reduced. This, the commonly used trap nitroso-t.-butane is reduced at a potential -0.98 V (vs. Ag/AgI) at mercury in dimethyl-formamide. The range may be extended by substitution of appropriate aryl groups for butane [114]. Nitroso compounds also present a problem in that some compounds have been shown to undergo a monomer/dimer equilibrium in solution in which only the monomeric form acts as a radical trap. Hence, for nitroso compounds, it is necessary to understand this equilibrium, as well as the electrochemical properties of the trap, before it may be used in the investigation of electrode reactions. 

The formamides 16 are intermediates. Formamide (Bredereck variant of the Traube synthesis [149]), formamidine, orthoformic ester, diethoxymethyl acetate, Vilsmeier reagent (fi om DMF and POCI3) and dithioformic acid are used as formic acid derivatives. 4,5-Diaminopyrimidines can be obtained from 4-aminopyrimidines 17 by nitrosation with HNO2 followed by reduction of the nitroso compounds 18 ... 

One-step process—Nitrosation—Formamides from nitroso compounds s. 17, 404... 

Modest amounts, of formamides and/or ureas resulted from reaction of aliphatic and cycloalkyl nitro compounds with Fe(CO)s (Alper, 1972b). Photoreduction of aromatic nitro compounds to nitroso compounds or... 

In addition, manganese oxide oxidizes benzylic methyl or methylene to carbonyl [814] and cleaves the carbon bonds of vicinal diols [577, 522]. It converts amines into imines [577, 525] tertiary amines into secondary amines [572], formamides [526, 527, 525], or ketones aromatic primary amines [575, 525] and hydrazo compounds [525] into azo compounds hy-droxylamines into nitroso [576] or nitro compounds [525] hydrazones into diazo compounds [520] phosphines into phosphine oxides [575] thiols into disulfides [576] and sulfides into sulfoxides [541]. 

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