200 



Professor Kolbe. 



[Mar. 12, 



Found. 



Calculated for I. II. III. IV. 



C 7 . . . . 84 61 -76 p. o 61 15 61 '58 — 61 '27 



H 8 .. 8 5-88 „ 6-27 6*02 — 6 '29 



N 8 . ... 28 20 -58 „ — — 20 '31 



O . . . . 16 



136 



A solution of caustic soda converts anthranilic amide slowly and 

 hydrochloric acid very quickly, into anthranilic acid (or its salts). 



The same conversion of isatoic acid into this amide is brought about 

 by the action of ammonia gas on the dry (isatoic) acid ; at about 60° a 

 vigorous action, with strong foaming, begins, and in a short time the 

 whole is converted into anthranilic amide. The formation of the 

 latter in this, as well as in the preceding case, is seen by the following 

 equation : — 



(C 6 H 4 N,CO)COONH 4 = C 6 H 4 NH 2 ,CONH 2 + C0 3 . 



Amnionic isatoate (hypothetical). Anthranilic amide. 



Anilin acts upon isatoic acid in an analogous manner to ammonia. 

 A mixture of equivalent molecules of both was warmed to 60°, at 

 which temperature the action, under strong foaming,* began and 

 completed itself. The resulting clear solution solidified on standing 

 for a short time, to a mass of glancing plates ; these crystals, after 

 being pressed and washed with a little dilute hydrochloric acid, to 

 free them from any adhering aniline, separated out from solution in 

 benzol, in which they are difficultly soluble, in white colourless 

 needles melting at 130°. 



Analysis of this Compound. 



I. 0*200 gram of the substance, which had been dried for a long 

 time at 80°, gave 0'105 gram H 2 and 0*541 gram C0 2 . 



II. 0*140 gram substance gave at 16° and 739 mm. bar. 16'3 c.c. N. 



Calculated for C fi 



Found. 



6 NH 2 J -—-6-5- I. II. 



C LV ... 156 73*58 p. c. 73 75 — 



H n ... 12 5 -65 „ 5-83 — 



No.... 28 13-20 „ — 13-19 



O .... 16 



212 



* A small quantity of ammonia came off along with the carbonic acid. 



