60 BIBLIOGRAPHY OF 



formed from acetoacetic ester and propylene bromid, boils at 210° to 

 215° From it were produced the free acid and aceto-meth3d-triniethy- 

 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, Cy HsOj 

 CNOH ; dehydracetic acid and phenylhydrazin form dehydraceto 

 phenylhydrazin, Cs Hs O; NNH Cg H5. Monobromdehydracetic acid 

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

 alcoholic potash it forms hydroxyl dehydracetic acid, Cs Hy O4 OH, 

 which melts with decomposition at 250° to 255° The silver salt, Cs He 

 O5 Aga, 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. cliim. 44, 242. 



Benzene=azo Ketone. 



Benzene-azo-acetoacetic ester, CH3 COCH (N, Ce H5) CO^ C^ H5, 

 formed from acetoacetic ester and diazobenzene chlorid melts at 75° 

 When saponified no substituted acetic acid could be obtained, only th< 

 benzene-azo acetone, CH3 COCH2 N2 Ce H^ which melts at i48°-i49' 

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

 azo-acetone were produced. 



