8 BIBLIOGRAPHY OF 



by treating aceto succinic ester with sodium, and the product with ethyl 

 iodid. Its formula is CH 3 



CO 



C (C 2 H 5 )-CH 2 



CO 2 C 2 H 5 CO 2 C 2 H 5 , it boils at 263 to 265, 



and does not dissolve sodium at ordinary temperatures nor when 

 gently heated. 



OPPENHEIM, A., AND H. PRECHT, 1876. 



Ber. 9, 318-323; J. Chem. Soc. 30, 69; Jsb. Chem. 1876, 604; Bull. 



Soc. chim. 26, 355. 



Formation of Acetoacetic Ester and Oxyuvitic Acid. 



After studying the action of sodium on acetic ester the authors con- 

 clude that no hydrogen is given off, and that the reaction is as follows: 

 3 CH 3 C0 2 C 2 H 5 + 4 Na=CH 3 CO CH Na CO 2 C 2 H 5 +3 C 2 H 5 ONa. 



In reference to oxyuvitic acid, they conclude that it cannot be formed 

 directly from sodacetoacetic ester and chloroform but that the presence 

 of sodium ethoxid is necessary. 



OPPENHEIM, A., AND H. PRECHT, 1876. 



Ber. 9*323-325; J. Chem. Soc. 30, 69; Jsb. Chem. 1876, 572. 

 Production and Properties of Dehydracetic Acid. 



Dehydracetic acid was made by passing the vapor of aceto acetic 

 ester through an iron tube heated to dull redness. It is a crystalline 

 substance of the formula Cg H 8 4 which melts at 108 and boils at 269 

 Acids do not affect it but alkalis decompose it into acetone and acetic 

 acid. 



DEMARCAY, E., 1876. 



Compt. rend. 82, 1337-1339 ; J. Chem. Soc. 30, 403 ; Ber. 9 962; 

 Jsb. Chem. 1876, 551 ; Bull. Soc. chim. 27, 120. 



Oxypyrotartaric Acid A Derivative of Acetoacetic Ester. 



Acetoacetic ester treated with hydrocyanic acid forms an addition 

 product, CH 3 COH (CN) CH 2 CO 2 C 2 H 5) which is decomposed by water, 

 forming oxypyrotartaric acid, CH 3 C OH (CO 2 H) CH 2 CO 2 H, ammo- 

 nia, and alcohol. 



DEMARCAY, E., 1876. 



Compt. rend 83, 449-451 ; J. Chem. Soc. 30, 506 ; Jsb. Chem. 



1876, 569. 

 Research upon the Derivatives of Acetovaleric Ester. 



Sodacetoacetic ester and isopropyl iodid, CH I (C H 3 ) 2 , react to form 

 isopropyl acetoacetic ester, CH 3 CO CH (C 3 H 7 ) CO 2 C 2 H 5 , which is 



