ACETO ACETIC ESTER 9} 



are amido-crotonic-esters and not imido-butyric esters. An interesting 

 fact is noted in regard to the melting points of these compounds. In- 

 troducing a methyl into the methyl ester lowers the melting point 26 

 and introducing an ethyl lowers it 8, while in the ethyl ester the intro- 

 duction of a methyl raises the melting point 15 and the introduction of 

 an ethyl raises it 23. 



JAPP, FRANCIS AND FELIX KLINQEMANN, 1887. 

 Ber. 20, 3284-3286 and 3398-3401. 



Benzene-azo- and Benzenehydrazopropionic Acids. 



Discussion is taken up in regard to the constitution of the benzene- 

 a-azopropionic acid, before described, and the formula is changed to 

 CH 3 C (: NH = N C 6 H 5 ) CO 2 H, as it is found to be identical with 

 phenylhydrazin pyroracemic acid. 



PETERS, T., 1887. 



Ber. 20, 3318-3324 ; J. Chem. Soc. 54 253 ; Jsb. Chem. 1887, 3318 ; 

 Bull. Soc. chim. 49 696. 



Action of Aqueous Ammonia on Alkylated Acetoacetic Esters and 



of Alcohols on the Carboxylic Alkyl Group in 



Acetoacetic Esters. 



Repeating Brandes 1 experiment with aqueous ammonia, the author 

 obtained with ethyl-acetoacetic ester besides amido-ethyl-acetoacetic 

 ester, an ethyl-acetoacetamid, CH 3 COCH (C 2 H 5 ) CONH 2 melting at 

 96 which is undoubtedly Brandes' second body. Methyl-, isobutyl- 

 and isoamyl-acetoacetamids were obtained from the corresponding 

 esters ; they melt respectively at 73, 85 and 1 27 The author finds that 

 the isobutyl and isoamyl esters may be readily prepared by the action 

 of the respective alcohol on the ethyl ester, especially in the presence 

 of a small quantity of sodium. 



