ACETO ACETIC ESTER 41 



CH 2 COCHC0 2 C 2 H 5 



the formula I melts at 127 and was found to 



CH 2 COCHC0 2 C 2 H 5 



be identical with the substance produced from brom-acetoacetic ester 

 and sodium. This can be changed into hydroquinone, C6H 4 (OH) 2 , 

 so that these reactions show a case of changing an acid of the fatty 

 series (acetic) into a benzene ring. . 



PERKIN, Jr., W. H., 1883. 



Ber. 16, 208-210; Jsb. Chem. 1883, IOI 5 '> Bull. Soc. chim. 40, 46. 

 Action of Trimethylene Bromid on Sod-acetoacetic Ester. 



This reaction gives acetotetramethylene carboxylic ester, 



CH 3 



CO 



I 



^ -"* 2 



C0 2 C 2 H 5 



which boils at 223 to 225. From this the acid and the silver salt 

 of the acid can be obtained. 



DUISBERG, C., 1883. 



Ber. 16, 295-297 ; J. Chem. Soc. 44, 656. 



Addition of Bromin to Acetoacetic Ester. 



This article is a reply to Lippmann and Conrad on this subject. The 

 author declares that acetoacetic ester is saturated and cannot form an 

 addition product. 



CHANCEL, G., 1883. 



Compt. rend. 96, 1466-1470 ; J. Chem. Soc. 44, 914 ; Jsb. Chem.. 1883, 



1078 ; Ber. 16, 1495. 



New Method of Synthesis of Alkylnitrous Acids. 



Acetoacetic ester and its alkyl derivatives are treated with nitric acid 

 and then with alcoholic potash when the nitrites are formed. Treated 



