428 



miicic acid with 2 mol. «-amino-pyridine is formed. At a tempera- 

 ture of abont 140° this salt begins to decompose: with separation 

 of water and carbon dioxide the pyrrole derivative is formed while 

 1 mol. amino pyridine is split off. Hence a distillate is obtained 

 which contains besides water, the required pyrrole derivative and 

 amino pyridine. We have subjected the reaction product to fractio- 

 nated distillation at 15 m.m. jiressure. The fust fi'action of 104 — 

 130° is cliietly «-amino pyridine; At 140 — 145° distills a liquid, of 

 a slight yellow colour, which solidifies to a white crystalline mass 

 on being- cooled in ice. The melting-point of these crystalls is 

 17° C. 



This substance is N-rt(pyridyl)-pyrrole, to which the following 

 structure formula (V) applies. 



V 



The freshly distilled N-(((-pyridyl)-pyrrole is a colourless liquid, 

 which, however, assumes a dark colour after some time. The boiling- 

 point at 760 mm. lies at 260 — 261°. 



This substance is sparingly soluble in cold water, volatile with 

 water vapour, and readily soluble in all organic solvents. A pine- 

 chip moistened with hydrochloric acid is coloured red-violet by 

 the vapour of N-(«-pyridyl)-pyrrole ; with a hydrochloric acid 

 solution of dimethylaminobenzaldehyde there arises a red-violet 

 colour, which later on changes into a dirty green. These colour 

 reactions are considered as characteristic of pyrrol derivatives. By 

 potassium permanganate this componnd is rapidly oxidized already 

 at the ordinary temperature. 



The values of 19.58° . N and 19.34 7, N were found for the 

 nitrogen percentage of this |)reparation, the calculated percentage 

 for C,HsNj being 19.44"/,. We have prepared a picrate of this 

 substance which melts at 143°. We obtained the iodine methylate 

 of the N («-pyridyl)-pyrrole by heating it in"a sealed tube at 100° 

 with the calculated quantity of methyl iodide. The reaction product 

 was recrystallised from alcohol: yellowish white prisms, melting- 

 point 141°— 142°. 



The isomeric N ((i-pyridylj-pyrrole prepared by Pictet and 

 Crépieüx has been described by these investigators as a liquid with 



