50 BIBLIOGRAPHY OF 



HECKMANN, JACOB, 1883. 



Ann. Cliem. 220, 128-146 ; Ber. 16, 2675 ; J. Chem. Soc. 46, 178 ; 

 Jsb. Chem. 1883, 1147 ; Bull. Soc. cliim. 42, 54. 



Dinitro=phenyl=acetoacetic Ester. 



By treating .sodacetoacetic ester with dinitro-brom-benzene, dinitro- 

 phenja-acetoacetic ester, CH3 CO C H [Ce H3 (NO2) 2] CO2 C^ H5, 

 is produced, it is crystalline and melts at 94° From this is produced, 

 by potassium hydroxid, ortho-para-dinitrophenyl acetic acid, CH2 Ce 

 H3 (N02)2C02 H, which melts at 160° and some di-nitro-toluol, Ce 

 H3 CH3 (N02)2- By means of boiling alkalis several complicated 

 decomposition products are obtained C24 H,,s Ne O15, melting at 105.5° 

 and from this, C24 H,6 K2 Ne O15, C4S H32 N6 Oig and a silver salt 

 C48 H29 Ag3 N6 0,9. 



PAAL, C, 1883. 



Ber. 16, 2865-2869; J. Chem. Soc. 46, 598; Jsb. Chem. 1883, 1220; 

 Bull. Soc. chim. 42, 541. 



Action of Brom=acetophenon on Sodacetoacetic Ester. 



These substances react with separation of sodium bromid to form 

 CH3 COCH (CH2 C0C6 H5) CO2 C2 Hs , which easily decomposes into 

 the acid and then into acetophenonacetone, (C6H5COCH2)CH2COCH3 . 

 When acetophenonacetoacetic ester is boiled with potassium hydroxid 

 an acid Ci2 H,o O3 , is formed by the separation of alcohol and water. 



ROSER, W., 1883. 



Ann. Chem. 220, 271-278 ; J. Chem. Soc. 46, 423. 



IsopropyI=succinic or Pimelic Acid. 



Isopropyl-.succinic acid was made from acetoacetic ester, mono- 

 chloracetic ester and isopropyl iodid, the acetyl being removed and the 

 ester obtained being changed to the acid. This was proven to be 



CO H 



identical with pimelic acid CH (CH3)2 — CH <ir^u p/-\ tt obtained 



from camphoric acid. 



