ACETO ACETIC ESTER 85 



and its acid are further studied. The acid heated with water gives 

 aceto-but}'! alcohol and by distillation of this, acetobutyl alcohol 

 anhydrid is obtained. The ester dissolves in hydrobromic acid to form 

 broni-butyl methylketone, CH3 CO (0112)4 Br. Analogous compounds 

 of some aromatic derivatives are cited. 



PERKIN, JR., W. H. AND P. C. FREER, i886. 



Ber. 19, 2561-2569 ; J. Chem. Soc. 52, 33. 



Upon Aceto=trimethylenecarboxylic Ester. 



This substance was proven by its physical properties to have a 

 trimethylene formula and thus to be : 



CH, CH3 CH3 



I ^ I I 



CO CO C — O — CH2 



I CH2 I II I 



C< I and not CH— CH=CH3 C CH^ 



1 CH2 I and not 1 



CO2 C2 H5 CO2 C2 H5 CO2 C, H5 



It was united with hydrobromic acid to form omega-brom-ethyl-aceto- 



acetic ester, CH3 COCHCCH^ CH^ Br)C02 Ca H^ , which is an oil 



which cannot be distilled. Saponifying this oil, aceto-propyl alcohol is 



obtained, (CH3 C0)CH2 CH2 CH2 OH, and sodium amalgam reduces 



this to gamma-pentylene glycol, CH3 CHOHCH2 CH2 CH2 OH. 



WITT, OTTO N., 1886. 



Ber. 19, 2977-2978 and 3299 ; J. Chem. Soc. 52, 247 ; Jsb. Chem. 

 1886, 783 ; Bull Soc. chim. 47» 434. 



Action of Acetoacetic Ester on Aromatic Diamins. 



Acetoacetic ester heated with ortho-toluylene-diamin Ce H3 CH3 



(NH2)2 , gives ethenyl-toluylene-diamin, C6H3CH3 <tvttt / C — CH3 , 



which melts at 201 "-202^ 



In the second communication the author acknowledges the priority 

 of Ladenburg and Riigheimer in the preparation of this compound. 



