Bell — On a Scries of Bases derived jh^om Pyrrol. 43- 



of C13II19N3O2. Since, however, I found in the watery distillate an 

 amount of amylia corresponding to the yield of amyl-pyrrol, I am 

 perfectly satisfied that it was not formed. The amide is best extracted 

 hy distillation over the naked flame, the heat being removed as soon as 

 the drops which condense in the neck of the retort become highly 

 coloured. The distillate quickly solidifies, and may be purified by 

 crystallization from boiling 60 per cent, alcohol, time being always 

 allowed for the oily drops which first separate to assume the solid 

 form. Diamyl-carbo-pyrrol-amide is then obtained in long and deli- 

 cate needles, which melt at 77^ C. It is still less easily attacked by 

 alkalies than its methyl and ethyl analogues. Prolonged boiling with 

 baryta water or with aqueous or alcoholic potash fails to alter it in the 

 slightest degree ; and even when distilled from soda lime, its very 

 partial decomposition is only betrayed by the powerful odour of the 

 amyl-pyrrol evolved. The greater part of it sublimes imchanged. 

 Nevertheless, the following analyses leave no doubt as to its compo- 

 sition : — 



Experiment. Calculated for 



I. II. III. C3H4 (CjHiOsN.Os. 



C = 71-89 72-19 - .... 72-0 



H= 10-66 - - .... 10-4 



N- - - 11-02 .... 11-2. 



The following reactions occur, then, during the dry distillation of 

 amylammonium mucate. 



Amyl-pyrrol. 



(1) CiHASCOOIs^CCHiOH. = C,H,(C,IIn)N + 2C0, + (C'sHiOH^N 



+ 4HoO. 



■ Diarayl-carbo-prrrol-amide. 



(2) C4H8042COOX(C5Hn)H3 = C5Hl(C5Hu)2is'oO + COo + 5Ho.O. 



Experiments which I have made with the mucate of phenylenc- 

 diamine (meta), owing probably to the easy alterability of the products, 

 have as yet led to no definite results. In a future communication I 

 hope to describe experiments with the salts of allylamine, naphthyl- 

 amine, and ethylene- and phenylene-diamines. 



Having established the fact that by distillation of the mucates of 

 primary amines we obtain mono-derivatives of pyrrol, it seemed next 

 of interest to ascertain whether the secondary amines would, under 

 similar circumstances, give rise to twice substituted derivatives. If 

 pyrrol were an amine of the form (C4ll3)II.3X, as Schiff and Kekulo 

 originally surmised, avc might expect to obtain such derivatives; but 



