Pyrrolo[2,1‐c][1,2,4]benzothiadiazines have been prepared from the reactions of o‐amino‐benzenesulfonamides with γ‐cyanopropionaldehydes. Pyrrolo[1,2‐a]quinazolines have been prepared from the reaction of anthranilamides with either γ‐cyanopropionaldehyde or succinic anhydride. The cyclization of a 4‐oxo‐2‐quinazolinepropionic acid has produced a pyrrolo‐[1,2‐a]quinazoline and the isomeric pyrrolo[2,1‐b]quinazoline.