ACETO ACETIC ESTER 33 



WLEUGEL, S., 1882. 



Ber. 15, 1050-1056 ; J. Chem. Soc. 42, 949 ; Jsb. Chem. 1882, 839 ; 

 Bull. Soc. chim. 38, 389. 



Upon the Knowledge of Nitroso=acetoacetic Esters. 



Since of the three compounds formed by the treatment of acetoacetic 

 ester with nitrous acid, namely : (i) the nitroso-acetoacetic ester ; (2) 

 nitroso-propionic acid and (3) nitroso-acetone, only the second can be 

 reduced to an amid, while the third forms a ketine, the author in- 

 vestigates the action of nascent hydrogen on the first, nitroso-aceto- 

 acetic ester, and obtained a dibasic acid which he calls ketindicarboxylic 

 acid, Cg Hg N2 O4 . The barium, silver, potassium, ammonium and 

 lead salts were described. The author advances the structural for- 

 mula 



N 

 / ^ 

 CH, C C CO, H 



.1 

 CH3C C CO, H 



\ // 



N 



PROPPER, MAX, 1882. 



Ber. 15, 1 154 ; J. Chem. Soc. 42, 1193. 



Action of Fuming Nitric Acid on Acetoacetic and on Mono=chIor= 



acetoacetic Esters. 



A preliminary notice stating that the author has obtained nitroso- 

 acetic and mono-chlor nitrosoacetic esters by these reactions. 



