Sentence Examples


  • The aqueous solution of the amines is now shaken up with diethyl oxalate, when the primary amine forms a crystalline dialkyl oxamide and the secondary amine an insoluble liquid, which is an ethyl dialkyl oxamate, the tertiary amine not reacting: (C02C2H5)2+ 2NH 2 R = (CO�NHR) 2 -{- 2C 2 H S OH; (CO 2 C 2 H 5) 2 -}- NHR 2 = C 2 H S O 2 C�Conr 2 -1-C 2 H S Oh.
  • Oxamic acid, HO 2 C CONH 2, is obtained on heating acid ammonium oxalate; by boiling oxamide with ammonia; and among the products produced when amino-acids are oxidized with potassium permanganate (J.
  • Mente, Ber., 1886, 19, p. 3229), crystallizes in prisms, and when boiled with water is rapidly hydrolysed to oxamide and oxalic acid.
  • Oxamide, (CONH 2) 2, is best prepared by the action of ammonia on the esters of oxalic acid.
  • And is readily soluble in water, but the solution is unstable and decomposes on standing, giving amorphous insoluble substances, and ammonium formate, oxalic acid, &c. An aqueous solution of hydrogen peroxide converts it into oxamide, (CONH 2) 2, and reduction by zinc and hydrochloric acid gives methylamine.