Synthesis of Benzoxazines, Quinazolines and 4H-Benzo[e][1,3]thiazine by ANRORC Rearrangements of 1,2,4-Oxadiazoles - Draghici, Bogdan; El-Gendy, Bahaa El-Dien M.; Katritzky, Alan R. (Synthesis, 2012)