5O BIBLIOGRAPHY OF 



HECKMANN, JACOB, 1883. 



Ann. Chem. 220, 128-146 ; Ber. 16, 2675 ; J. Chem. Soc. 46. i? 8 ; 

 Jsb. Chem. 1883, 1147 ; Bull. Soc. chim. 4 2 54- 



Dinitro=phenyl=acetoacetic Ester. 



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

 phenyl-acetoacetic ester, CH 3 CO C H [C 6 H 3 (NO 2 ) J CO 2 C 2 H 5 , 

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

 by potassium hydroxid, ortho-para-dinitrophenyl acetic acid, CH 2 Ce 

 H 3 (NO 2 ) 2 CO 2 H, which melts at 160 and some di-nitro-toluol, Ce 

 H 3 CH 3 (NO 2 ) 2 . By means of boiling alkalis several complicated 

 decomposition products are obtained C 24 H l8 N 6 O I5 , melting at 105.5 

 and from this, C 24 H l6 K 2 N 6 O J5 , C 4 g H 32 N 6 O I9 and a silver salt 

 C 48 H 29 Ag 3 N 6 I9 . 



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 

 CH 3 COCH(CH 2 COC 6 H 5 )C0 2 C 2 H 5 , which easily decomposes into 

 the acid and then into acetophenonacetone, (C 6 H 5 COCH 2 )CH 2 COCH 3 . 

 When acetophenonacetoacetic ester is boiled with potassium hydroxid 

 an acid C I2 H IO O 3 , is formed by the separation of alcohol and water. 



ROSER, W., 1883. 



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

 Isopropyl-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 



identical with pimelic acid CH (CH,) 2 CH <^ 2 ^ obtained 



Url 2 CU 2 fl, 



from camphoric acid. 



