1)4 ' BIBLIOGRAPHY OF 



COLLIE, J. NORMAN, 1891. 



J. Chem. Soc. 59» 617-621. 

 Some Reactions of Dehydracetic Acid. 



In the preparation of dehydracetic acid by passing acetoacetic ester 

 through a red-hot iron tube, there were formed, besides the dehydra- 

 cetic acid, acetone, alcohol, carbon dioxid, ethylene and a residue. 

 Acetoacetic methyl ester similarly treated gave large quantities of 

 dehydracetic acid, but ethylacetoacetic ester gave none at all. De- 

 hydracetic acid is slightly decomposed by water into carbon dioxid and 

 dimethylpyrone. When boiled with hydrochloric acid it is totally 

 decomposed into carbon dioxid and a compound, C7H11O3CI, which 

 melts at 83 -85 and is acid in water solution. Barium and copper 

 salts of dehydracetic acid were prepared, the former corresponded most 

 nearly with (C8H9 05)2Ba and was considered to be the salt of 

 tetracetic acid, CH3 CO CH^ COCH^ COCH^ CO^H; and the latter 

 corresponded to C24 H25 O9 N3 Cu, being formed by ammonia and copper 

 acetate. Hydrocyanic acid has no action on dehydracetic acid. 



BIQINELLI, P., 1891. 



Ber. 24, 2962-2967; J. Chem. Soc. 62, 56. 

 Aldehydeuramids of Acetoacetic Ester. Part IL 



In the continuation of the subject it is found that two isomers, cor- 

 responding to the two formulae given in the first article on this subject,* 

 are always produced. The compounds 



CH, 

 I 

 C:4 H16 N2 O4 ;-C : N. CO. N. CH Ce H4 OH 

 I 



CH2 



CO2 C2 H5 

 CH3 

 and C-NH-CO-N— CH— CeH^OH 



II 



CH 



CO2 C2 H5 

 formed from carbamid, salicylaldehyde and acetoacetic ester, and the 

 similar compounds, C17H22N2O3, formed from cumaldehyde, C6H4 

 (C3 H7) COH, carbamid and acetoacetic ester ; C16 His N2 O3 , obtained 

 by using cinnamaldehyde, and C12 H14 N2 O4 , obtained by using 

 furfural dehyde, are produced and described. 



* See page 130. 



