Complex sentence: In the synthesis of cyanamides and dicyanamides, primary and secondary amines react with CNBr to yield mono-and dialkylcyanamides, which can further react with amines and hydroxylamine to yield guanidines and hydroxyguanidines.
Split into simpler sentences: In the synthesis of cyanamides and dicyanamides, primary and secondary amines react with CNBr to yield mono-and dialkylcyanamides. This can further react with amines and hydroxylamine to yield guanidines and hydroxyguanidines.