( 153 ) 



in literature, also bv Icttino- methvlio iodide act upon the silver salt 

 of succinoamido-acid, and convinced ourselves that both compounds 

 arc identical. If the imide is boiled with methylic alcohol, ethereal 

 salt formation takes equally place, though slowly. 



CHa— CO 

 The transformation of the suocinphenvliniide | >NCcH5 in 



CII.— CO 

 CIl,— CO— NHCcH, 

 the oijiorcal salt of the aniido-acid | , which takes 



CH.-CO-COOCITa 

 place easily if methylic alcohol containing muriatic acid is used, seems 

 to be more difficult when this alcohol alone is employed. We had 

 to heat up to 240° ('. in order to obtain a satisfactory result. We 

 consider our work witli this imide as not yet finished. 



CH.— CO 

 If the suecinparanitrobenz\limide | >N CH.^ Co Hi NOo is 



CIL— CO 

 heated with a septuple quantity of methylic alcohol for some hours 



CH2 CO. NH. CHp, C(jH,NOo 

 at 170° C, a small quantity of the ester | 



CH2.COOCH3 



is formed. Experiments on ethereal salt formation at lower tempe- 

 ratures were not made in this case. On the other hand this methylic 

 salt, when heated to 170° C. with methylic alcohol, is for the greater 

 part transformed in the imide. 



ClI— CO 

 The maleinphenvlimide || >XCoH-; (1 part), when heated 



CH— CO 

 with methvlic alcohol (7 parts) at 170° C, is transformed partlv in 



CH-CO-KIICeHj 

 the methylic phenylamidomaleinate |1 . The same 



CH-COOCH3 

 reaction takes place already, though slowly, when the phonylimide 

 is boiled with methvlic alcohol. 



/CO 

 The pbtalphenvlimide 0^11^ >NCgH5, when heated with 



^CO 

 methylic alcohol on a waterbath in a flask connected with an 

 inverted condenser, or at a higher temperature in sealed tubes, 

 produces small quantities of the methylic phenylamidophtalate 



/CO— NHC, H5 

 Co H4 . The fact of this ethereal salt being unstable 



\C0 CH3 

 against methylic alcohol we learn at once, when trying to crystallize 



