ACETO ACETIC ESTER 4I 



CH3 — COCHCO2C2H5 

 the formula l i melts at 127° and was found to 



CH2— COCHCO2C2H5 



be identical with the substance produced from brom-acetoacetic ester 



and sodium. This can be changed into hydroquinone, Ce H4 (0H)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, 1015 ; Bull. Soc. chim. 40, 46. 



Action of Trimethylene Bromid on Sod=acetoacetic Ester. 



This reaction gives acetotetramethjdene carboxylic ester, 



CH3 



I 

 CO 



I 



C<!pTT ^CHj 



I 



C02 C2 H5 

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

 of the acid can be obtained. 



DUISBERQ, 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, Q., 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 



