Sentence Examples


  • Grimaux by heating one part of glyoxylic acid with two parts of urea for ten hours at ioo° C.: 2CO(NH 2) 2 + CH(OH) 2 Oooh = 3h 2 O + C4H6N403.
  • On heating with water it undergoes hydrolysis into urea and allanturic acid C 3 H 4 O 3 N 2.
  • It is reduced by sodium amalgam to glycouril C 4 H 6 N 4 O 2, whilst with hydriodic acid it yields urea and hydantoin C 3 H 4 N 2 O 2.
  • By using urea, guanidine, thiourea and related compounds instead of amidines, one obtains the uracils.
  • The dihydro derivatives are most probably those compounds which are formed in the condensation of acidyl derivatives of acetone, with urea, guanidine, &c. Tetrahydropyrimidines are obtained by the action of amidines on trimethylene bromide: Br(CH 2) 3 Br+C 6 H 5 C (:NH) NH 2 = 2HBr+C 4 H 7 N 2 (C 6 H 5) [2].

How would you define urea? Add your definition here.

comments powered by Disqus