ACETO ACETIC ESTER I I 



only slight evolution in a warm reaction. Amyl alcohol is also pro- 

 duced. Acetoacetic am^d ester is colorless, boils at 223°, has a specific 

 gravity of .954 at 10°, and colors ferric chlorid red. Ethylacetoacetic 

 amyl ester, CH3 CO CH ( C^ H5 ) CO^ C3 H„, was also produced, it 

 boils at 233° to 236°, has a specific gravity of .937 at 26° and gives no 

 color with ferric chlorid. 



CONRAD, M., 1877. 

 Ann. Chem. 186, 232-244 ; J. Chem. Soc. 32, 435 ; Jsb. Chem. 



1877, 690. 

 Halogen Substitution Products of Acetoacetic Ester. 



When acetoacetic ester is treated with bromin it takes it up and hydro- 

 bromic acid is given off, forming the compound Ce Hg Br^ O3. Its 

 specific gravit}' is 2.32 at 21° and it is decomposed upon distillation. 

 Chlorin passed through acetoacetic ester is absorbed, hydrochloric acid 

 is given off, and Ce Hg CU O3 is formed. This boils at 205° to 207° and 

 its specific gravity is 1.293 at i6.° To prove the constitution of the last 

 compound it was treated with hydrochloric acid at 180°, when dichlor- 

 acetone, CH3 CO CH CI2, was formed, and with caustic potash when 

 dichloracetic ester, CH CI2 CO2 C2 H5, was separated. Ethjdacetoacetic 

 ester was treated with chlorin and CH3 CO C CI (C^ H5 ) CO^ C^ H5 

 was obtained. The author decides that the dichloracetoacetic ester is 

 CH3 CO C CI2 CO2 C2 H5. Amyl ester of acetoacetic acid and the amyl 

 ester of ethjdacetoacetic acid were treated with chlorin, and dichlor- 

 acetoacetic amyl ester and eth3d-monochloracetoacetic amyl ester were 

 produced. 



BONNE, JULIUS, 1877. 



Ann. Chem. 187, i-ii ; J. Chem. Soc. 32. 437 

 Benzoylacetoacetic Ester. 



When benzoyl chlorid acts upon sodacetoacetic ester the two sub- 

 stances combine and sodium chlorid is formed. The compound, ben- 

 zoylacetoacetic ester, CH3 CO CH ( CO Ce H5 ) CO2 C2 H5, decomposes, 

 upon being distilled, into carbon monoxid, carbon dioxid, benzoic ester 

 and benzoic acid. When treated wdth caustic potash methyl phenyl 

 ketone, CH3 CO Ce H5, and a little benzoic acid are produced. 



