1,2,4,3,5-Benzotrithiadiazepine and its unexpected hydrolysis to unusual 7H,14H-dibenzo[d,i][1,2,6,7,3,8]tetrathiadiazecine
Abstract
Previously unknown 1,2,4,3,5-benzotrithiadiazepine 1 was prepared by 1∶1 condensation of Ph-NSN-SiMe3 with S2Cl2 followed by intramolecular ortho-cyclization of [Ph-NSN-S-S-Cl] intermediate, and hydrolyzed in pyridine to unusual macrocyclic 7H,14H-dibenzo[d,i][1,2,6,7,3,8]tetrathiadiazecine 2.