ACETO ACETIC ESTER IO9 



ZURCHER, H., 1889. 

 Ann. Chem. 250, 281-294 ; J. Chem. Soc. 56. 725 ; Ber. 22, 258 (C). 



Action of Thiocyanates and Thiocarbarnids on 

 Chlorinated Acetoacetic Esters. 



Methyl-oxythiazole-carboxylic ester, 



C0 2 C 2 H 5 C S, 



II I 

 CH 3 C COH 



\ ^ 



N 



is formed from monochlor-acetoacetic ester and a metallic thiocyanate. 

 Some of its reactions and derivatives are described. Thiocarbamid 

 acting on monochlor-acetoacetic ester gives amidomethyl-thiazole- 

 carboxylic ester, 



C0 2 C 2 H 5 C S 



II I 

 CH 3 C CNH 2 



\ S 



N 



from which the free acid and some of its salts were obtained. Dichlor- 

 acetoacetic ester reacts with barium thiocyanate to form a compound 

 d 4 H^Oy N 2 S 2 . With thiocarbamid dtchlor-acetoacetic ester does 

 not react. 



FEIST, FRANZ, 1889. 



Ber. 22, 1570-1571 ; J. Chem. Soc. 56, 957; Bull. Soc. chim. 



Dehydracetic Acid. 



Dehydracetic acid when treated with hydriodic acid gives dimethyl- 

 \ 



pyrone, co < > ' which melts at X2 ' boils at 



