ACETO ACETIC ESTER 3 1 



TOLLENS, B., 1881. 



Ann. Chem. 209,30-38 ; J. Chem. Soc. 40, 1162 ; Jsb. Chem. 1881, 1054. 



Diabetic Urine. 



The author decides that the substance in urine of diabetic 

 patients which gives a red color with ferric chlorid is not acetoacetic 

 ester as is claimed, but the free acid of that ester. 



THORNE, L. T., 1881. 



J. Chem. Soc. 39 336-344 ; Ber. 14, 2238, Jsb. Chem. 1881, 759. 

 Products of the Action of Alkalis on ^9-Ethylaceto-succinic Ester. 



Acetoacetic ester treated with a-brom-butyric ester gives /5-ethyl- 

 aceto-succinic ester, CH 3 C 2 H 5 



CO* 



CH- CH 



CO 2 C 2 H 5 CO 2 C 2 H 5 , which boils at 263 and has 

 a specific gravity of 1,064 at l & When this is treated with an alkali 

 ethyl-succiuic acid is formed which is identical with that produced from 

 -ethyl-aceto-succinic ester, CH 3 



CO 



C C 2 H 5 - -CH 2 



CO 2 C 2 H 5 CO 2 C 2 H 5 , by Huggenberg 



(Ann. Chem. I9 2 > 146.) and also -ethyl-/9-aceto-propionic acid, ( CH 3 

 CO) CH 2 CH (C 2 H 5 ) CO 2 H. 



BURTON, BEVERLY 5., 1881. 



Am. Chem. J, 3 385-395 ; J. Chem. Soc. 42, 599 ; Ber. 15. 949 ; Jsb. 



Chem. 1882, 653. 



On the Propyl Derivatives and Decomposition Products 

 of Acetoacetic Ester. 



Propyl-acetoacetic ester is a liquid which boils at 208 to 209 

 and has a specific gravity of .981 at o. 



Di-propyl-acetoacetic ester boils at 235 to 236 and has a specific 

 gravity of .958 at o. Quantitive experiments were made in the saponi- 

 fication of these esters and results were obtained, similar to those of 



