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- 



CH3 



I 



CO • 



methylene carboxylic ester, C <^f;->CH2, is formed which is isomeric 



CO2 a H5 



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



aceto-tetramethylene, CH3COCH (CH2)3, which boils at 109°- 110° 



Ce He; 

 I 

 CO 



I CfT 



Benzoyl-tetra-methylene carboxylic ester, C <z;f;^>CH2, was formed 



I Cxlj 



CO2 C2 He; 



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

 the silver salt and benzoyl-tetra-methylene, Ce H5CO CH (CH2)3. were 

 obtained. 



WEDEL, WILHELM, 1883. 



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

 1060; Bull. Soc. chim. 4'. i8r ; Ber. 16, 2288. 



Derivatives of Acetoacetic Ester. 



By treating dibrom-acetoacetic ester with sodium, an ester, Ce H7 

 O3, is produced and from this its acid, C4H3O3. 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 C12 H14 Oe- By the action of acetyl chlorid on this 

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



