ACETO ACETIC ESTER 53 



BEHREND, ROBERT, 1883. 

 Ber. 16, 3027-3028 ; J. Chem. Soc. 46, 583. 

 Action of Car bam id on Acetoacetic Ester. 



These substances unite thus : 



C 6 H IO 3 + (NH 2 ) 2 CO = C 7 H I2 N 2 O 3 + H 2 O . 



The product formed is crystalline and melts at 147. Acids decom- 

 pose it into acetoacetic ester and carbamid again. From it can be 

 obtained the sodium salt of the acid C 5 H 8 N 2 O 3 , which is C 5 H 7 NaN 2 O 3 . 

 The author is investigating the structure of the compound. 



JAMES, J. WM., 1884. 



Ann. Chem. 226, 202-222 ; J. Chem. Soc. 47, i-n ; Ber. 17. 604 (C). 

 Jsb. Chem. 1884, 1120. 



Acetoacetic Ester. 



According to Wedel, ethyl-acetoacetic ester is CH 3 COC 2 H 5 : CHCO 2 R 

 and sodiumethylacetoacetic ester would be CH 3 CO Na : C (C 2 H 5 ) CO 2 R, 

 so that if it were treated with acetic acid an isomeric ethylacetoacetic 

 ester should be obtained, but the author proves that an identical ethyl- 

 acetoacetic ester is recovered. Experiments were made to determine if 

 the order of introduction of alkyl radicals in the di-substitution pro- 

 ducts affects the products. No difference could be detected between 

 allyl-methyl-acetoacetic ester and methyl-allyl-acetoacetic ester or 

 between ethyl-methyl- and methyl-ethyl-acetoacetic esters. Acetyl- 

 acetoacetic ester was produced from acetoacetic ester and acetyl chlorid, 

 it boils at 2oo-2O5 with slight decomposition. It is decomposed by 

 water at ordinary temperatures into acetoacetic ester. The copper 

 and nickel compounds were described. An attempt was made to 

 substitute the hydrogen by sodium but it failed as decomposition took 

 place. The acetyl-methyl-acetoacetic ester was prepared from methyl- 

 acetoacetic ester and acetyl chlorid. Benzoyl-acetoacetic ester, CH 3 

 COCH (COC 6 H 5 ) CO 2 C 2 H 5 , and its copper compound were prepared 

 and described. 



