66 BIBLIOGRAPHY OF 



BEHREND, ROBERT, 1885. 



Ann. Chem. 229, 5-31 ; Ber. 18, 543 (C) ; Jsb. Chem. 1885, 654. 

 Bull. Soc. chim. 46, 360. 



Action of Urea on Acetoacetic Ester. 



NH C CH, 

 I ii 



By this action /9 Uramidocrotonic ester, CO CH , is formed. 



NH 2 CO 2 C 2 H 5 



NH C CH 3 



! il 



From this was formed methyluracyl, CO CH , which decom- 



I I 



NH CO 



poses at 270 280 without melting. From this, trimethyluracyl, 

 C 7 H IO N 2 O 2 , melting point 103; and nitrouracyl carboxylic acid, 

 C 5 H 3 N 3 O6 , were formed, and from the latter, nitrouracyl, C 4 H 3 N 3 O 4 ; 

 amidouracyl, C 4 H 5 N 3 O 2 ; and oxyuracyl, C 4 H 4 N 2 O 3 . Amidouracyl 

 salts give with potassium cyanate, hydroxyxanthin, C 5 H 6 N 4 O 3 + 

 ^H 2 O, which may be oxidized to alloxan and this reduced to allox- 

 antin. 



KUCKERT, OTTO, 1885. 



Ber. 18, 618-620 ; J. Chem. Soc. 48, 751 ; Jsb. 1885, 1351 ; Bull Soc. 



chim. 46, 8. 



Action of Alkylamins on Acetoacetic Esters. 



Acetoacetic ester when treated with methylamin forms two com- 

 pounds according to the temperature. If kept at o an addition pro- 

 duct is formed which melts at 42-43 and easily changes into an oil, 

 the same as the product which is formed if the temperature is not kept 



CH 3 CH 3 



low. This is either C = N CH 3 or C NHCH 3 . Diethylamin 



I il 



CH 2 CH 



C0 2 C 2 H 5 C0 2 C 2 H 5 



