1)2 BIBLIOGRAPHY OF 



Kthylidinacetoacetic ester and paramido-acetoacetic ester were mixed 

 in molecular proportions and united to form dihydrocollidin-dicarboxy- 

 lic ester. Several other experiments were performed and several 

 pyridin derivatives made and described. They all agreed with these 

 reactions. 



FREER, P. C., 1891. 



Am. Chem. J. 13, 308-322; J. Chem. Soc. 60, 1181. 



Constitution of Aliphatic Ketones and the Action of Sodium on 



Acetone. 



The constitution of acetoacetic ester is discussed at length and 

 mention is made of the work done by different chemists upon it. 

 Acetic ester dried over calcium chlorid and by being boiled over 

 phosphorus pentoxid is found to react with sodium readily which 

 inclines the author to believe in the intermediate sodacetic ester. A 

 comparison of the properties and reactions of tetric acid and acetoacetic 

 ester seems to show that the former contains a hydroxyl group and the 

 latter does not. In the sodium derivative the author believes the sodium 

 is joined to the oxygen, therefore that its constitution is different from 

 that of acetoacetic ester itself. This is shown by the fact that sodaceto- 

 acetic ester will form addition products with unsaturated compounds 

 like cinnamic ester while the acetoacetic ester itself will not. 



FREER, PAUL C. AND QEO. O. HIGLEY, 1891. 



Am. Chem. J. 13, 322-326; J. Chem. Soc. 60, 1182. 

 Action of Chlorcarbonic Ester on Acetone Sodium. 



By this action a colorless oil boiling at about 125 was obtained which 

 appears to be an isomer of acetoacetic ester. It is insoluble in water, 

 miscible with alcohol and ether and does not react with phenyl hydrazin 

 or ferric chlorid. On boiling with hydro chloric acid it is decomposed 

 into carbon dioxid, alcohol and acetone. The authors suggest for it 



the formula 2 C-O-CO 2 C 2 H 



