Organic heterocyclothiazenes. Part 12. 1,3,5,2,4-Trithiadiazines
Abstract
Diazomethane and its alkyl and aryl derivatives react as ylides with tetrasulphur tetranitride in boiling dichloromethane to give the red crystalline 1,3λ4δ2,5,2,4-trithiadiazines (2), (5), and (7). The five contiguous heteroatoms in this new ring system form a planar U-shaped S3N2 unit, very similar to that in S4N2(3) and the dihydrotrithiadiazepine (4).