60 BIBLIOGRAPHY OF 



formed from acetoacetic ester and propylene bromid, boils at 210 tcf 

 215 From it were produced the free acid and aceto-methyl-trimethy- 

 lene. 



PERKIN, Jr., W. H. and C. BERNHART, 1884. 



Ber. 17* 1522-1527; J. Chem. Soc. 46, 1121. 



Dehydracetic Acid. 



Dehydracetic acid and hydroxylamin form dehydracetoxim, C 7 H 8 O 3 

 CNOH ; dehydracetic acid and phenylhydrazin form dehydraceto 

 phenylhydrazin, Cs H 8 O 3 NNH Ce H 5 . Monobromdehydracetic acid 

 melting at 136- 137 was obtained and if this be allowed to stand with 

 alcoholic potash it forms hydroxyl dehydracetic acid, CsH 7 O 4 OH, 

 which melts with decomposition at 250 to 255. The silver salt, CsH 6 

 O 5 Ag 2 , was formed showing the acid to be dibasic. By careful treat- 

 ment of dehydracetic acid with cold potash an oil was obtained which 

 was thought to be acetoacetic acid. 



RICHTER, V. v. AND H. MUNZER, 1884. 



Ber. 17, 1926-1930; J. Chem. Soc. 46, 1342; Jsb. Chem. 1884, 1051 ; 

 Bull. Soc. chim. 44> 242. 



Benzene-azo Ketone. 



Benzene-azo-acetoacetic ester, CH 3 COCH (N 2 C 6 H 5 ) CO 2 C 2 H 5 , 

 formed from acetoacetic ester and diazobenzene chlorid melts at 75. 

 When saponified no substituted acetic acid could be obtained, only the 

 benzene-azo acetone, CH 3 CO CH 2 N 2 Ce H 5 , which melts at 148- 149. 

 In the same manner para-toluene-azo- acetoacetic ester and para-toluene- 

 azo-acetone were produced. 



