ACETO ACETIC ESTER I 5 



DEMARCAY, E., 1877. 

 Ber. 10, 1177-1178. 

 Acetoacetic Ester. 



The author has worked on the chlorcrotonic acids. The meth}-!, — 

 ethyl, — and propyl-acetoacetic esters were converted into the correspond- 

 ing chlorcrotonic acids and described. 



ROHN, WILHELM, 1877. 



Ann. Chem. 190, 305-322 ; Ber. 11, 252; Jsb. Chem. 1877, 688. 



Isobutyl=acetoacetic Ester and Isobutyl=acetic Acid. 



Acetoacetic ester treated with isobutyl iodid gives isobutyl aceto- 

 acetic ester CH3 



CO 



CH CH2 CH (CH3), 



CO2 C2 H5 which boils at 2i7°-2i8° and has a 



specific gravity of .951 at 17.5° When saponified it yields isobutyl 

 acetone, CH3 CO CH^ [CH^ CH (CH3)2], wdiich boils at 142= to 144° 

 and has a specific gravity of .817 at 17° and isobut^'l acetic acid, 

 CH2 [CH2 CH (CH,).,] CO2 H. 



MIEHLE, GUSTAV., 1877. 

 Ann. Chem. 190, 322-327 ; J. Chem. Soc. 34. 490 ; Jsb. Chem. 



1877, 688. 

 Synthesis of Tricarbailylic Acid. 



Acetosuccinic ester, made from sodacetoacetic ester and monochlor- 

 acetic ester, was treated with sodium and then with monochlor-acetic 

 ester and aceto-tricarballylic ester CHj CO, C2 Hj 



CH3 CO-C CO2 C2 H5 



CH2 CO2 C2 H5 was produced. 

 It boils, with decomposition at 280° to 300° When treated with hot 

 potassium hydroxid it gives potassium tricarballylate from which can 

 be obtained tricarball^dic acid C3 H5 (CO2 H)3. 



