14 BIBLIOGRAPHY OF 



SAUR, RICHARD, 1877. 

 Ann. Chem. 188, 257-269. 



Methyl=ethyl=acetoacetic Ester, Methyl=ethyl=acetic Acid and 

 =Methyl=ethyI= / ?=oxybutyric Acid. 



Methyl-ethyl-acetoacetic ester, CH 3 CO C(CH 3 )(C 2 H 5 )CO 2 C 2 H 5 , 

 is colorless, boils at 198 and its specific gravity is .974 at 22. It pro- 

 duces a violet color with ferric chlorid. When treated with sodium 

 ethoxid it gives methyl-ethyl acetic ester, CH (CH 3 )(C 2 H 5 ) CO 2 C 2 H 5 , 

 while sodium amalgam acting on it produces a-methyl-ethyl-/9-oxybu- 

 tyric ester. 



CONRAD, M., 1877. 



Ann. Chem. 188, 269-274. 

 Metal Acetoacetic Esters. 



The copper, nickel, cobalt, magnesium, and aluminum salts of aceto- 

 acetic ester were produced and described. In each case but one hy- 

 drogen atom of the methylene group in acetoacetic ester can be re- 

 placed. This can be replaced by either a metal or a non-metal because 

 its position between two carbonyl groups weakens its positive character. 



NORTON, TH. AND A. OPPENHEIM, 1877. 



Ber. 10, 701-704 ; Jsb. Chem. 1877, 685. 

 Action of Carbon Bisulfid on Acetoacetic Ester. 



By this action a monobasic acid of the forrnula CH 3 



CO 

 r f C: S 2 H 



{ C: S O C 2 H 5 

 C0 2 C 2 H 5 



was formed which was named by the authors thiorufic acid. A metallic 

 oxid and carbon bisulfid acting on acetoacetic ester produce a compound 

 CH 3 CO C (:C: S) CO 2 C 2 H 5 which the authors consider as the acetyl 

 derivative of CH (:C: S) CO 2 H, which they name thio-carbacetic acid. 



