Primary Amines to Imines and Aldehydes or Ketones

Dehydrogenation of Primary Amines to Imines and Aldehydes or Ketones 

The elimination of hydrogen from nitrogen of the amino group and from the carbon of the adjacent methylene or methine group converts primary amines into imino compounds and, in the presence of water, into aldehydes or ketones. Imines are sometimes intercepted [198, 833, 850, 917, 918, 957, 1189] (equation 508). 

In amines with the primary amino group bonded to a secondary carbon, dehydrogenation results in the formation of ketones [850, 851, 692] (equation 509). 

The oxidation of benzhydrylamine with potassium permanganate gives 

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