1. The preparation of 2H-1,2,3-benzothiadiazine-1,1-dioxides, 11H-11a-dihydrobenzimidazo[1,2-b] [1,2] benzisothiazole-5,5-dioxides, 6H-dibenzo[c,g] [1,2,5] thiadiazocine-5,5-dioxides and 5H-Dibenzo[c,g] [1,2,6] thiadiazocine-6,6-dioxides
2. Synthesis of a New Heterocyclic Ring—2,5-Dihydro-1,2,4-benzothiadiazepine 1,1-Dioxide and its Intermediates
3. All melting points are corrected.
4. Microanalyses were performed by Mr. N. Knight and his associates and NMR data were obtained by Dr. G. Slomp, Mr. F. MacKellar and Mr. J. Zieserl, Jr., of our Physical and Analytical Chemistry Department. The author is indebted also to Mr. P. Meulman for the infrared data, to Miss B. Zimmer for the ultraviolet data and to Mr. A. Lallinger for excellent technical assistance.