198 PROCEEDINGS OF THE AMERICAN ACADEMY 



0.3385 grm. air-dried salt gave 0.1790 grm. K 2 S0 4 . 



Calculated for KC 6 H 5 3 . Found. 



K 23.83 23.74 



Ethyl Methyl pyromucate, C 6 H 5 3 C 2 H.5. — The ethyl ether of the 

 acid we made in the ordinary way by saturating a solution in an 

 equal weight of absolute alcohol with hydrochloric acid. The ex- 

 cess of hydrochloric acid was then driven off at a gentle heat, the 

 ether precipitated with water, washed with a dilute solution of 

 sodic carbonate, dried with calcic chloride and distilled. The 

 whole product passed over between 212° and 215°, and by far 

 the greater portion showed the constant boiling point 213-214° 

 with the mercury column completely in vapor under a pressure of 

 766 mm. The ether showed no tendency toward crystallization 

 when cooled with ice and salt. 



I. 0.2363 grm. substance gave 0.5404 grm. C0 2 and 0.1392 grm. 



H 2 0. 

 II. 0.1570 grm. substance gave 0.3585 grm. C0 2 and 0.0921 grm. 

 H 2 0. 



Methylpyromucamide, C 6 H 5 2 NH 2 . — Ethyl methylpyromucate 

 is readily attacked by concentrated aqueous ammonia, and the re- 

 action is completed in the cold after the lapse of two days. The 

 clear solution then yields on evaporation the corresponding amide 

 in long colorless prisms which melt at 131°. It is readily soluble 

 in alcohol, dissolves freely in hot benzol or ligroin, sparingly in 

 the cold, and may best be recrystallized from hot water, in which 

 it is readily soluble. 



I. 0.2207 grm. substance gave 22.8 c.c. of moist nitrogen at 28° 

 and under a pressure of 762 mm. 

 II. 0.1839 grm. substance gave 19.1 c.c. of moist nitrogen at 26° 

 and under a pressure of 751 mm. 



N 



