Roger P. Staiger
This 52 page thesis investigates the reactions of thioisatoic anhydride with sodium hydroxide, ammonia, a series of diprotic amines and methyl iodide.
Davis, Joan Louise, "The Synthesis, Characterization and Reactions of 1,2-dihydro-2-thiono, 3,1-Benzoxazin-4-one and its Isomer the 3,1-benzothiazine-2 (1H), 4-dione" (1967). Chemistry Honors Papers. 14.