Mr Ruhemann, Action of Urethane on Esters, etc. 181 



Action of Urethane on Esters of Organic Acids and Mustard 

 Oils. By S. Ruhemann, M.A., Gonville and Caius College, and 

 J. G. Priestley, M.A. 



[Bead 8 February 1909.] 



The sodium-derivative of ethyl carbamate reacts with ethyl 

 phenyl propiolate not by addition, but with formation of ethyl 

 phenylpropiolylcarbamate. Similarly the esters of fatty saturated 

 acids furnish acid derivatives of ethyl carbamate. 



Phenyl mustard oil reacts with ethyl sodiocarbamate mainly 

 according to the equation: 



2C6H5NCS5 + NaNH . CO,Et - dsHioONaS^Na + C^HsO, 



and yields the anhydride of diphenylthiobiuretcarboxylic acid. 

 Besides this compound, a small quantity of carboxyethylphenyl- 

 thiocarbamide, 



NH(C02Et)CS.NH.C6H5, 



is formed. Analogous is the action of ethyl sodiocarbamate on 

 other mustard oils. 



