ACETO ACETIC ESTER 43 



hydrochloric acid and diethyl-acetoacetic acid, CH 3 CO C(C 2 H 5 ) 2 

 CO 2 H, is thus produced. It is very unstable, decomposing at 60 into 

 diethyl-acetone, CH 3 CO CH (C 2 H 5 ) 2 , which boils at 135 to 137. 

 Diethyl-acetoacetate of sodium was produced. 



ELION, H., 1883. 



Rec.* trav. chim. 2, 33-34 and 202-204 ; Ber. 16, 1368 and 2762. 

 Diacetyl-acetic Ester. 



By treating ethyl- acetoacetic ester with water-free, sodium hydroxid 

 and the product with acetyl chlorid, ethyl-diacetyl-acetic ester was 

 produced, it boils at 235. Acetoacetic ester treated thus gives diacetyl- 

 acetic ester which boils at 210 to 213 with some decomposition, its 

 specific gravity is i.i at 15 It is decomposed by boiling with water. 



Original article not consulted. 



MATTHEWS, F. E., 1883. 

 J. Chetn. Soc. 43, 200-207 ; Ber. 16, 1372. 



Condensation Products of Aldehydes with Acetoacetic Ester and 

 some Substituted Acetoacetic Esters. 



This article is almost the same as the one by Claisen and Matthews 

 in fAnn. Chem. 218, 170. The author concludes that all aldehyde 

 condensations with acetoacetic ester take place with the methylene 

 group and are easily accomplished because of the position of the 

 methylene group between the carbonyl and carboxyl groups, but that 

 such condensations with mono-or di-substitution acetoacetic ester take 

 place in the methyl group and consequently are more difficult to ac- 

 complish. 



f vSee page 40. 



