ACETO ACETIC ESTER. 7 



nionochloracetic ester forms acetosuccinic ester which boils at 260 to 

 263 with partial decomposition, its specific gravity is 1.079 at 2I 



Sodacetoacetic ester treated with chlorcarbonic ester, Cl CO 2 C 2 H 5i 

 forms aceto-malonic ester which boils at 238 to 240 and has a specific 

 gravity of 1.080 at 23 



Sodacetoacetic ester treated with allyl iodid forms allylacetoacetic 

 ester an oil with a specific gravity of .982 at 20 



WISLICENUS, J., ZEIDLER, EHRLICH, ROHRBECK, WALD- 

 SCHM1DT, SAUR AND CONRAD, 1875. 



Ber. 8, 1034-1040 ; J. Chem. Soc. 29, 368 ; Bull. Soc. chim. 25, 299. 

 Derivatives of Acetoacetic Ester. 



Allylacetoacetic ester is saponified to allylacetone, CH 3 CO CH 2 CH 2 

 CH CH 2 , which boils at 130 Allylacetoacetic ester when treated 

 with sodethoxicl gives allylacetic ester, CH 2 ( C 3 H 5 ) CO 2 C 2 H 5 boiling 

 at 142 to 144 from which comes allylacetic acid boiling at 182 Ben- 

 zylacetoacetic ester CH 3 .CO CH ( CH 2 C 6 H 5 ) CO 2 C 2 H 5 and the 

 dibenzyl derivative are prepared. Methylacetoacetic ester is converted 

 into tt-methyl /2-oxybutyric acid and ^-methyl crotonic acid, a-ethyl 

 /9-oxy butyric acid and -ethyl crotonic acid are obtained similarly. 

 Ethyl-methyl acetoacetic ester boiling at 198 is prepared and from it 

 ethyl-methyl acetic ester boiling at 132 and its acid (valeric) boiling at 



137- 



Dichlor-acetoacetic ester boiling at 205 -207 is prepared and from it 

 dichloracetone. Ethyl acetoacetic ester will form but a mono chlor 

 derivative therefore it is CH 3 CO C Cl ( C 2 H 5 ) CO 2 R not CH 2 Cl CO 

 CH ( C 2 H 5 ) C0 2 R. 



WISLICENUS, J., F. CLOWES AND C. HUGQENBERQ, 1875. 



Ber. 8, 1206-1209 ; J. Chem. Soc. 29, 565 ; Bull. Soc. chim. 25, 460. 



Ethyl-aceto Succinic Esters. 



/9-Ethyl-acetosuccinic ester was obtained from sodaceto acetic ester 

 and a-brombutyric ester. Its formula is CH 3 CH 3 



CO' CH 2 



CH- -CH 



CO 2 C 2 H 5 CO 2 C 2 H 5 , it is 



a colorless oil, boils at 262 and dissolves sodium at ordinary tempera- 

 tures, giving off hydrogen. a-ethyl-acetosuccinic ester was obtained 



