7O ELECTROLYSIS AND ELECTROSYNTHESlS 



toluidene and the dimethylene-ditoluidene at the end 

 of the operation. 



A further application 1 of Gattermann's reaction 

 has been found in the case of aromatic nitr amines* 

 which if reduced in a concentrated solution of sul- 

 phuric acid give amido-phenol derivatives. The 

 process can also be applied to the esters of nitro- 

 carboxylic acids 8 and results in the formation of 

 amido-phenol-carboxylic esters. 



Nitro-sulphonic acids * show a similar behavior, 

 while the p-nitro- or p-nitroso-alkyl-anilines* and 

 toluidenes, as the case may be, are reduced to 

 p-amido-derivatives of alkylated m-oxy-anilines or 

 their homologues. 



The nitro-derivatives of the quinoline* series show a 

 deportment similar to that of the derivatives of 

 benzene. 



Nitre-aldehydes ^ which Gattermann 7 has also chosen 

 for the subject of thorough investigation, conduct 

 themselves differently from the nitro-compounds thus 

 far described. 



If the nitro-aldehydes are reduced there are formed 

 either the free aldehyde-phenyl-hydroxylamines, or 



German Pat., 77806. 



Ibid.. 78829. 



Ibid.. 79865. 



Ibid., 81621. 



Ibid... 81625. 



Ibid., 80978. 



Chem. Ber., 29, 3037; German Pat. 85198. 



