SEARCH Articles Figures Tables Amination primary Amine urea Amines primary From Primary Amines From aminals From amines Monosubstituted Monosubstituted ureas Monosubstitution N Monosubstituted ureas from primary N Monosubstituted ureas from primary amines and silicon tetraisocyan N Monosubstituted ureas from primary amines and silicon tetraisocyan N- amines N-Amination Primary silicon Silicon from urea Ureas from amines Ureas from amines and