Sn. Shah et Nk. Chudgar, Thermolysis of semicarbazones to the corresponding azines through reactiveN-substituted isocyanate intermediates, MOLECULES, 5(4), 2000, pp. 657-664
Thermolysis of semicarbazones (I) to azines (II) occurs through reactive N-
substituted isocyanate intermediates (Ia) which can be converted in situ to
carbamates and N-substituted ureas.