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 y9-Ethylaceto=succinic Ester. 



Acetoacetic ester treated with a-brom-butyric ester gives ,.?-ethyl- 

 aceto-succinic ester, CH. C2 H^ 



CO 



CH CH 



CO, C2 H5 CO, C2 H,. which boils at 263° and has 

 a specific gravity of 1,064 ^^ ^6° When this is treated with an alkali 

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

 «-ethyl-aceto-succinic ester, CH3 



CO^ 



C C2 H5 CH2 



CO2 C, H5 CO2 C2 H5, by Huggenberg 

 (Ann. Chem. 192, 146.) and also a-ethyl-/?-aceto-propionic acid, ( CH, 

 CO) CH2 CH (C, Hs) CO2 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 0° 



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

 gravit}^ of .958 at 0° Quantitive experiments were made in the saponi- 

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



