249 



H-C, = K— 



H-C 

 3 



N- 

 4 



cbinoxaline 



-;7 3 



6 2 



N — / ^3 

 1 



Indophenazine 



B 



-C = N 



C 



D 



N - 



IN H 1 



ps-Indohpenazi ne 



-G = N 



B 



1 



D 



C = N — I J2 

 \/ 

 1 



C u maroph enazine. 



a — D,,3, — Chlo r oi ndoph en azi ne. 



Prepared by condensing- p-chloro-o-phenylenediamine with 

 isatin in aequimoleeular proportions in acetic acid solution at the 

 boiling température of the mixture. Light yellow needles or soales 

 from alcohol. M. p. above 300°. Easily soluble in aceton and Chlo- 

 roform. The alcoholic solution yields with ammoniac, silver nitrate 

 solution a red precipitate. 



Analysis: 



0.1561 gr. gave 22-8 cm^ N (p=742ww t=l8») 



found 16-46»/o N 

 calcul, for CuHgNgCl - l(r677„ N 



y. — D., (3, — Chloro-Pr-acetylindophenazine 



may lie obtained by boiling the former with anhydrous acetic 

 acid. It crystallises from alcohol in white needles, in whicb it is 

 not very easily soluble. Aceton, benzène, ether and chloroform dis- 

 solve it easily. M. p. 208". 



Analysis: 



0.1157 gr. gave 150 cm^ N (t=14-5'' p=734)»MM 

 found 14-49Vo 1^'- 

 calcul, for Ci„H,„N3 0Cl 14-24 „ 



