ACETO ACETIC ESTER 85 



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

 aceto-butyl alcohol and by distillation of this, acetobutyl alcohol 

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

 brom-butyl methylketone, CH 3 CO(CH 2 ) 4 Br. Analogous compounds 

 of some aromatic derivatives are cited. 



PERKIN, JR., W. H. AND P. C. FREER, 1886. 



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 3 CH 3 



CO CO 



I CH 2 I 



C< L and not CH CH=CH 2 



I ^Aia and not 



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



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

 acetic ester, CH 3 COCH(CH 2 CH 2 Br)CO 2 C 2 H 5 , which is an oil 

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

 obtained, (CH 3 CO)CH 2 CH 2 CH 2 OH, and sodium amalgam reduces 

 this to gamma-pentylene glycol, CH 3 CHOHCH 2 CH 2 CH 2 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 H 3 CH 3 

 (NH 2 ) 2 , gives ethenyl-toluylene-diamin, C 6 H 3 CH 3 <^^C CH 3 , 



which melts at 2oi-2O2. 



In the second communication the author acknowledges the priority 

 of L,adenburg and Riigheimer in the preparation of this compound. 



