ACETO ACETIC ESTER 15 



DEMARCAY, E., 1877. 

 Ber. 10, 1177-1178. 

 Acetoacetic Ester. 



The author has worked on the chlorcrotonic acids. The methyl, 

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

 ing chlorcrotonic acids and described. 



ROHN, WILHELM, 1877. 



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

 Isobutyl-acetoacetic Ester and Isobutyl-acetic Acid. 



Acetoacetic ester treated with isobutyl iodid gives isobutyl aceto- 

 acetic ester CH 3 



CO 



CH CH 2 CH (CH 3 ) 2 



CO 2 C 2 H 5 which boils at 2i7-2i8 and has a 



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

 acetone, CH 3 CO CH 2 [CH 2 CH (CH 3 )J, which boils at 142 to 144 

 and has a specific gravity of .817 at 17 and isobutyl acetic acid, 

 CH 2 [CH 2 CH (CH 3 )J C0 2 H. 



MIEHLE, GUSTAV., 1877. 

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



1877, 688. 

 Synthesis of Tricarballylic 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 CH 2 CO 2 C 2 H 5 



CH 3 CO-C CO 2 C 2 H 5 



CH 2 CO 2 C 2 H 5 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 tricarballylic acid C 3 H 5 (CO 2 H) 3 . 



