ACETO ACETIC ESTER. 7 



monochloracetic ester forms acetosuccinic ester which boils at 260° to 

 263° with partial decomposition, its specific gravitj' is 1.079 at 21! 



Sodacetoacetic ester treated with chlorcarbonic ester, CI CO2 C2 H5, 

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

 gravity of 1.080 at 23! 



Sodacetoacetic ester treated with all_vl iodid forms allylacetoacetic 

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



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

 SCHMIDT, SAUR AND CONRAD, 1875. 



Ber. 8, 1 034-1 040 ; J. Chem. See. 29, 368; Bull. Soc. chim. 25, 299. 



Derivatives of Acetoacetic Ester. 



Allylacetoacetic ester is saponified to allylacetone, CH3 CO CH2 CH2 

 CH CHo, which boils at 130° Allylacetoacetic ester when treated 

 with sodethoxid gives allylacetic ester, CH^ ( C3 H5 ) CO2 C2 H5 boiling 

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

 zylacetoacetic ester CH3 CO CH ( CH2 Ce H5 ) CO2 C2 H5 and the 

 dibenzyl derivative are prepared. Methylacetoacetic ester is converted 

 into «-methyl /?-oxybutyric acid and ^-methyl crotonic acid, «-ethyl 

 j9-ox3-butyric acid and a-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, CO C CI ( C2 H5 ) CO2 R not CH2 CI CO 

 CH ( C2 Hs ) CO2 R. 



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



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



Ethyl=aceto Succinic Esters. 



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

 and a-brombutyric ester. Its formula is CH3 CH3 



CO CH, 



CH CH 



CO2 C2 H5 CO2 C2 H5, it is 



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

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



