Sciencemadness Discussion Board

Formation of Amides from Esters

DraconicAcid - 8-4-2015 at 13:18

So, following this prep: http://illumina-chemie.de/acetamid-t2333.html

I tried to make anthranilamide from ammonia and methyl anthranilate. After several days of stirring, there was still quite a bit of liquid ester sitting at the bottom of the flask. Is there any reason this reaction isn't heated? Any other way to speed it up? (I'm not an organic chemist, but the one I work with told me it should work....)

Nicodem - 8-4-2015 at 14:12

Aromatic esters are less reactive toward ammonolysis than acetates. I doubt you will get it going at room temperature. In CN101575301, they heat methyl 5-chloroanthranilate with aq. ammonia to 100-150 °C for 12 h. In US20090081158, they heat methyl 3-iodo-5-chloroanthranilate with methanolic ammonia to 110 °C for 3 h. So find yourself an autoclave reactor.