Lassar-Cohn-Application of some general reactions to by Lassar Cohn

By Lassar Cohn

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Rend. 1903, 136, 1198. FIXATION OF LABILE HYDROGEN ATOMS. of indigo, only yields quantity salt, in good results sufficient to convert the if alkali present in is imide into 17 sodium its accordance with the equation N -Na+ 2NaOH+ NaOCl NH now be It will reaction which C 6H 4 COONa + Na2 C0 3 + Nad. - 2 convenient to consider the case of a it is desired to employ the progress of which would be hindered, or completely inhibited, by The behavior the free hydroxyl of the carboxyl group. of aminoacetic acid towards nitrous acid affords one of Very numerous have been to convert made attempts undoubtedly the best examples in this connection.

26 it is impossible to prevent the formation of azoxy- benzene and other compounds intermediate between nitrobenzene and aniline, and, in order to ascertain the progress of the reaction, successive portions of the it is necessary to test with product Fehling's and stop the experiment when the maximum reduction is observed. Further work led to the use solution the of zinc-copper couple, a small containing only proportion of copper, in place of zinc-dust. This was boiled for several hours on the water-bath with nitro- benzene, in ethereal solution, and aqueous calcium and yielded hydroxylamine derivatives free from by-products.

Solvent water by aqueous potassium heretofore reactions in The (II) alcohol. carried substitution of the The (Ill) with out effect of fixing the labile hydrogen atoms in the solvent and reagent by replacing of or ethyl. In this would be interesting to determine the using the methoxides and ethoxides of the connection effect them with methyl it alkaline-earth metals. (IV) In many cases it would be extremely important to ascertain the result of replacing sodium or potassium hydroxide barium, and other hydroxides.

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