Secondary amines, derivatives nitrous acid action

Nitroso derivatives are valuable for characterizing secondary amines and can be used as starting points for the synthesis of A,iV-disubstituted hydrazines. Nitrosamines are usually prepared by the action of nitrous acid on aliphatic... 

Pseudoeoniceine is a product of the dehydration of pseudoconhydrine with phosphoric anhydride (191). It is a strongly basic, colorless oil, b.p. 171-172°, d4 0.8776, [ ] + 122.6°, which forms salts (Table 3). It reduces potassium permanganate readily and on treatment of its hydrochloride with nitrous acid gives rise to a nitrosoamine so that it is an unsaturated secondary amine. It readily absorbs hydrogen iodide with the formation of an iodoconiine hydriodide, m.p. 182°, which is different from the derivative obtained by the direct action of fuming hydriodic acid on pseudoconhydrine since the hydriodide of the latter melts at 216-217°. Pseudoeoniceine when reduced either via its iodo derivative (191) or... 

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