ACETO ACETIC ESTER I 7 



RUCKER, AUG., 1877. 

 Ber. 10, 1954 ; Ann. Chem. 201, 54 ; J. Chem. Soc. 34 292 ; Jsb. Chem. 



1880, 810. 

 Methyl Crotonic Acid. 



Methyl-acetoacetic ester. CH 3 CO CH (CH 3 ) CO 2 C 2 H 5 , treated with 

 phosphorus pentachlorid gives only one compound a-methyl /9-chlor 

 crotonic acid CH 2 



C-C1 



CH (CH 3 ) 



CO 2 H which melts at 69.5 The barium, sodium and 

 silver salts and the ethyl ester were described. 



WOLFF, CARL, 1877. 



Ber. 10, 1956-1958; Ann. Chem. 201, 45; Jsb. Chem. 1877, 687. 

 Diallyl-acetoacetic Ester and its Derivatives. 



Diallylacetoacetic Ester, CH 3 CO C (C 3 H 5 ) 2 CO 2 C 2 H 5 , boils at 239 

 to 241 and has a specific gravity of .948 at 25 It is decomposed by 

 alkalis in two ways forming (i) diallylacetone which boils at 174- 175 

 and (2) into diallyl acetic acid which boils at 221 "-22 2 and has a 

 specific gravity of .949 at 25. To obtain the first product the alkali 

 is added cold and the substance is shaken out with ether. To obtain 

 the second add sulfuric acid to the dry mixture and the acid separates 

 as an oil. The barium, calcium and silver salts are described. 

 Possibly this diallylacetic acid C H (C 3 H 5 ) 2 CO 2 H when oxidized 

 will give tricarballylic acid C 3 H 5 (CO 2 H) 3 since allylacetic acid 

 gives succinic acid. 



MEYER, VICTOR, 1877. 



Ber. 10, 2075-2078; Jsb. Chem. 1877, 518 and 770. 

 Azophenylacetoacetic Acid. 



When azobenzene nitrate C& H 5 N 2 NO 3 is treated with potassium 

 acetoacetic ester, azophenylacetoacetic acid CH 3 CO CH (N a C 6 H 5 ) 



