66 BIBLIOGRAPHY OF 



BEHREND, ROBERT, 1885. 



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

 Bull. Soc. chim. 46, 360. 



Action of Urea on Acetoacetic Ester. 



NH — C — CH3 



I II 



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



NH2 CO2 C2 H, 



NH — C — CH, 



I ti 



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



I I 



NH — CO 



poses at 270°-28o° without melting. From this, trimeth^duracyl, 



C7 Hio N2 O2 , melting point 103°; and nitrouracyl carboxylic acid, 



C5H3N3O6 , were formed, and from the latter, nitrouracyl, C4H3N3O4 ; 



amidouracyl, C4 H5 N3 O2 ; and oxyuracyl, C4 H4 N, O3 . Amidouracyl 



salts give with potas.sium cyanate, hydroxy xanthin, C5H6N4O3 + 



^Ha 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 All<ylamins on Acetoacetic Esters. 



Acetoacetic ester when treated with methylamin forms two com- 

 pounds according to the temperature. If kept at 0° an addition pro- 

 duct is formed which melts at 42 "-43° and easil}' changes into an oil, 

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



CH3 CH, 



low. This is either C = N — CH3 or C— NHCH, . Diethvlamin 

 I II 



CH2 CH 



CO2 C2 H, CO2 C2 H5 



