The synthetic approaches to novel N- and SO2-containing bi-, tri- and tetra
cyclic systems, 6,8-di- and 2,4,6,8-tetraalkyl-7-oxo-3-thia-2,4,6,8-tetraaz
abicyclo[3.3.0]octane-3,3-dioxides, 8,12-dioxo-9,11-dimethyl-4-thia-1,3,5,7
,9,11-hexaazatricyclo[5.5.1.0(10,13)]-tridecane-4,4-dioxide and 8,16-dioxo-
3,5,11,13-tetramethyl-4,12-dithia-1,3,5,7,9,11,13,15-octaazatetracyclo[7.7.
2.0(7,17).01(5,18)]octa-decane-4,4,12,12-tetraoxide, have been developed.