44 BIBLIOGRAPHY OF 



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

 Ber. 16, 1787-1789; J. Chem. Soc. 44 1083; Jsb. Chem. 1883, 1015. 



Action of Trimethylene Bromid on Acetoacetic, Benzoylacetic 

 and Malonic Esters. 



By the action of trimethylene bromid on acetoacetic ester, aceto-tetra- 



CH 3 



CO 



I r^TT 



methylene carboxylic ester, C <r;;; 2 >CH 2 , is formed which isisomeric 



I <-H 2 



C0 2 C 2 H 5 



but not identical with allyl-acetoacetic ester. From this is obtained 

 aceto-tetramethylene, CH 3 COCH (CH 2 ) 3 , which boils at 109- no? 



C 6 H 5 



CO 



I OTT 



Benzoyl-tetra-methylene carboxylic ester, C <r; 2 >CH 2 , was formed 



I (~tt-2 



C0 2 C 2 H 5 



from tri-methylene-bromid and benzoyl-acetic ester and from it the acid, 

 the silver salt and benzoyl-tetra-methylene, C6H 5 COCH (CH 2 ) 3 , were 

 obtained. 



WEDEL, WILHELM, 1883. 



Ann. Chem. 219* 71-119 ; J- Chem. Soc. 46. 834; Jsb. Chem. 1883, 

 1060; Bull. Soc. chim. 41* 181 ; Ber. 16, 2288. 



Derivatives of Acetoacetic Ester. 



By treating dibrom- acetoacetic ester with sodium, an ester, C 6 H 7 

 O 3 , is produced and from this its acid, C 4 H 3 O 3 . These resemble in 

 properties Duisberg's oxytetrolic acid and ester, but the author decides 

 that the ester is identical with Herrmann's quinon-hydrodicarboxylic 

 ester of the formula C I2 H I4 Oe- By the action of acetyl chlorid on this 

 ester, a diacetyl compound is formed which the author takes as proof 



